HR job title
- Retired Senior Professor
- Contact Info
- 1 979 845 1585
Hartwig, Karl Professor
Positions
- Professor, Materials Science and Engineering, College of Engineering
- Faculty Affiliate, Energy Institute, Texas A&M Engineering Experiment Station (TEES)
My research focuses on: (a) Development of improved materials for various applications: electrical conductors including superconductors, light weight structures, high density structures, and human implants (Mg and Ti); (b) Understanding structure-property-processing relationships in metal alloys; (c) Severe plastic deformation processing of solid and particulate materials via equal channel angular extrusion (ECAE); (d) Applied superconductivity - superconductor stabilizer materials and conductor design; and (e) Material failure analysis.
- Overview
- Publications
- Research
- Teaching
- Works By Students
- Background
- Contact
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Overview
Publications
selected publications
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academic article
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Levin, Z. S., Wang, X., Kaynak, M., Karaman, I., & Hartwig, K. T.
(2019).
Strength and ductility of powder consolidated ultrafine-grain tantalum. International Journal of Refractory Metals and Hard Materials.
80, 73-84.
-
Deng, L., Wang, B., Han, K. e., Niu, R., Xiang, H., Hartwig, K. T., & Yang, X.
(2019).
Response of microstructure to annealing in in situ Cu-Nb microcomposite. Journal of Materials Science.
54(1), 840-850.
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Ly, R., Hartwig, K., & Castaneda, H.
(2018).
Influence of dynamic recrystallization and shear banding on the localized corrosion of severely deformed Al-Mg-Si alloy. Materialia.
4, 457-465.
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Ning, J., Vinh, N., Huang, Y., Hartwig, K. T., & Liang, S. Y.
(2018).
Inverse determination of Johnson-Cook model constants of ultra-fine-grained titanium based on chip formation model and iterative gradient search. The International Journal of Advanced Manufacturing Technology.
99(5-8), 1131-1140.
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Davis, B., Dabrow, D., Newell, R., Miller, A., Schueller, J. K., Xiao, G., ... Huang, Y.
(2018).
Chip Morphology and Chip Formation Mechanisms During Machining of ECAE-Processed Titanium. Journal of Manufacturing Science and Engineering.
140(3),
-
Ly, R., Hartwig, K. T., & Castaneda, H.
(2018).
Effects of strain localization on the corrosion behavior of ultra-fine grained aluminum alloy AA6061. Corrosion Science.
139, 47-57.
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Levin, Z. S., Srivastava, A., Foley, D. C., & Hartwig, K. T.
(2018).
Fracture in annealed and severely deformed tungsten. Materials Science & Engineering: A.
734, 244-254.
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Levin, Z. S., & Hartwig, K. T.
(2017).
Strong ductile bulk tungsten. Materials Science & Engineering: A.
707, 602-611.
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Springs, J. C., Srivastava, A., Levin, Z. S., Barber, R. E., & Hartwig, K. T.
(2017).
Microstructure and Mechanical Properties of Heavily Worked and Recrystallized Copper for Low-Temperature Superconductor Applications. IEEE Transactions on Applied Superconductivity.
27(4), 1-5.
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Song, M., Sun, C., Fan, Z., Chen, Y., Zhu, R., Yu, K. Y., ... Zhang, X.
(2016).
A roadmap for tailoring the strength and ductility of ferritic/martensitic T91 steel via thermo-mechanical treatment. ACTA MATERIALIA.
112, 361-377.
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Levin, Z. S., & Hartwig, K. T.
(2015).
Hardness and microstructure of tungsten heavy alloy subjected to severe plastic deformation and post-processing heat treatment. Materials Science & Engineering: A.
635, 94-101.
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Sun, C., Zheng, S., Wei, C. C., Wu, Y., Shao, L., Yang, Y., ... Zhang, X.
(2015).
Superior radiation-resistant nanoengineered austenitic 304L stainless steel for applications in extreme radiation environments. Scientific Reports.
5(1), 7801.
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Sandim, H., Bolmaro, R. E., Renzetti, R. A., Sandim, M., Hartwig, K. T., Vogel, S. C., & Raabe, D.
(2014).
Texture Evolution as Determined by In situ Neutron Diffraction During Annealing of Iron Deformed by Equal Channel Angular Pressing. 45A(10), 4235-4246.
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Song, M., Wu, Y. D., Chen, D., Wang, X. M., Sun, C., Yu, K. Y., ... Zhang, X.
(2014).
Response of equal channel angular extrusion processed ultrafine-grained T91 steel subjected to high temperature heavy ion irradiation. ACTA MATERIALIA.
74, 285-295.
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Deng, L., Han, K. e., Hartwig, K. T., Siegrist, T. M., Dong, L., Sun, Z., Yang, X., & Liu, Q.
(2014).
Hardness, electrical resistivity, and modeling of in situ Cu-Nb microcomposites. Journal of Alloys and Compounds.
602, 331-338.
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Sun, C., Brown, D. W., Clausen, B., Foley, D. C., Yu, K. Y., Chen, Y., ... Zhang, X.
(2014).
In situ neutron diffraction study on temperature dependent deformation mechanisms of ultrafine grained austenitic Fe-14Cr-16Ni alloy. International journal of plasticity.
53, 125-134.
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Sun, C., Ma, J., Yang, Y., Hartwig, K. T., Maloy, S. A., Wang, H., & Zhang, X.
(2014).
Temperature and grain size dependent plastic instability and strain rate sensitivity of ultrafine grained austenitic Fe-14Cr-16Ni alloy. Materials Science & Engineering: A.
597, 415-421.
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Song, M., Zhu, R., Foley, D. C., Sun, C., Chen, Y., Hartwig, K. T., & Zhang, X.
(2013).
Enhancement of strength and ductility in ultrafine-grained T91 steel through thermomechanical treatments. Journal of Materials Science.
48(21), 7360-7373.
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Balachandran, S., Elwell, R. C., Kang, D., Barber, R. E., Bieler, T. R., & Hartwig, K. T.
(2013).
Nb Tubes for Seamless SRF Cavities. 23(3), 7100904-7100904.
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Song, M., Sun, C., Jang, J., Han, C. H., Kim, T. K., Hartwig, K. T., & Zhang, X.
(2013).
Microstructure refinement and strengthening mechanisms of a 12Cr ODS steel processed by equal channel angular extrusion. Journal of Alloys and Compounds.
577, 247-256.
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Razavi, S. M., Foley, D. C., Karaman, I., Hartwig, K. T., Duygulu, O., Kecskes, L. J., Mathaudhu, S. N., & Hammond, V. H.
(2012).
Effect of grain size on prismatic slip in Mg-3Al-1Zn alloy. Scripta Materialia.
67(5), 439-442.
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Pan, Z., Xu, F., Mathaudhu, S. N., Kecskes, L. J., Yin, W. H., Zhang, X. Y., Hartwig, K. T., & Wei, Q.
(2012).
Microstructural evolution and mechanical properties of niobium processed by equal channel angular extrusion up to 24 passes. ACTA MATERIALIA.
60(5), 2310-2323.
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Sun, C., Yang, Y., Liu, Y., Hartwig, K. T., Wang, H., Maloy, S. A., Allen, T. R., & Zhang, X.
(2012).
Thermal stability of ultrafine grained Fe-Cr-Ni alloy. Materials Science & Engineering: A.
542, 64-70.
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Sun, C., Yu, K. Y., Lee, J. H., Liu, Y., Wang, H., Shao, L., ... Zhang, X.
(2012).
Enhanced radiation tolerance of ultrafine grained Fe-Cr-Ni alloy. Journal of Nuclear Materials.
420(1-3), 235-240.
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Al-Maharbi, M., Karaman, I., Beyerlein, I. J., Foley, D., Hartwig, K. T., Kecskes, L. J., & Mathaudhu, S. N.
(2011).
Microstructure, crystallographic texture, and plastic anisotropy evolution in an Mg alloy during equal channel angular extrusion processing. Materials Science & Engineering: A.
528(25-26), 7616-7627.
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Hartwig, K. T., Balachandran, S., Barber, R. E., Pyon, T., & Griffin, R. B.
(2011).
Design Aspects of Dual Nb-Ta Sheet Diffusion Barriers for Nb3Sn Conductors. 21(3), 2563-2566.
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Balachandran, S., Barber, R. E., Huang, Y., Miao, H., Parrell, J. A., Griffin, R. B., & Hartwig, K. T.
(2011).
Influences of Different ECAE Routes on Filament Deformation in Cu Clad Nb Composite Wires. 21(3), 2584-2587.
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Foley, D. C., Al-Maharbi, M., Hartwig, K. T., Karaman, I., Kecskes, L. J., & Mathaudhu, S. N.
(2011).
Grain refinement vs. crystallographic texture: Mechanical anisotropy in a magnesium alloy. Scripta Materialia.
64(2), 193-196.
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Rajgarhia, R. K., Saxena, A., Spearot, D. E., Hartwig, K. T., More, K. L., Kenik, E. A., & Meyer, H.
(2010).
Microstructural stability of copper with antimony dopants at grain boundaries: experiments and molecular dynamics simulations. Journal of Materials Science.
45(24), 6707-6718.
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Bieler, T. R., Wright, N. T., Pourboghrat, F., Compton, C., Hartwig, K. T., Baars, D., ... Liu, W.
(2010).
Physical and mechanical metallurgy of high purity Nb for accelerator cavities. Physical Review Special Topics: Accelerators and Beams.
13(3), 031002.
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Balachandran, S., Hartwig, K. T., Baars, D. C., Mathaudhu, S. N., Bieler, T. R., Pyon, T., & Barber, R. E.
(2009).
Fabrication of Tantalum Sheet for Superconductor Diffusion Barriers. 19(3), 2606-2609.
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Beyerlein, I. J., Field, R. D., Hartwig, K. T., & Necker, C. T.
(2008).
Texture development in two-pass ECAE-processed beryllium. Journal of Materials Science.
43(23-24), 7465-7473.
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Wei, Q., Ramesh, K. T., Kecskes, L. J., Mathaudhu, S. N., & Hartwig, K. T
(2008).
10.4028/0-87849-384-0.75. Materials Science Forum.
579, 75-90.
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Mathaudhu, S. N., Hartwig, K. T., & Karaman, I.
(2007).
Consolidation of blended powders by severe plastic deformation to form amorphous metal matrix composites. Journal of Non-Crystalline Solids.
353(2), 185-193.
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Morehead, M., Huang, Y., & Hartwig, K. T.
(2007).
Machinability of ultrafine-grained copper using tungsten carbide and polycrystalline diamond tools. International journal of machine tools & manufacture.
47(2), 286-293.
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Baars, D., Bieler, T. R., Hartwig, K. T., Jiang, H., Compton, C., & Grimm, T. L.
(2007).
Processing strategies for niobium sheet used in advanced superconducting particle accelerator cavities. JOM.
59(6), 50-55.
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Mathaudhu, S. N., & Hartwig, K. T.
(2006).
Grain refinement and recrystallization of heavily worked tantalum. Materials Science & Engineering: A.
426(1-2), 128-142.
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Kecskes, L. J., Gardiner, D. M., Woodman, R. H., Barber, R. E., & Hartwig, K. T.
(2006).
Severe plastic deformation of nickel-coated aluminum precursor powders at elevated temperatures. Metallurgical and Materials Transactions A.
37A(2), 449-457.
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Haouaoui, M., Hartwig, K. T., & Payzant, E. A.
(2005).
Effect of strain path on texture and annealing, microstructure development in bulk pure copper processed by simple shear. ACTA MATERIALIA.
53(3), 801-810.
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Wei, Q., Kecskes, L., Jiao, T., Hartwig, K. T., Ramesh, K. T., & Ma, E.
(2004).
Adiabatic shear banding in ultrafine-grained Fe processed by severe plastic deformation. ACTA MATERIALIA.
52(7), 1859-1869.
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Im, J. T., Hartwig, K. T., & Sharp, J.
(2004).
Microstructural refinement of cast p-type Bi2Te3-Sb2Te3 by equal channel angular extrusion. ACTA MATERIALIA.
52(1), 49-55.
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Barber, R. E., Dudo, T., Yasskin, P. B., & Hartwig, K. T.
(2004).
Product yield for ECAE processing. Scripta Materialia.
51(5), 373-377.
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Xia, Z. Y., Hartwig, T., & Sue, H. J.
(2004).
Mechanical Behavior of bulk poly(ethylene terephthalate) subjected to simple shear. Journal of Macromolecular Science Part B: Physics.
B43(2), 385-403.
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Karaman, I., Robertson, J., Im, J. T., Mathaudhu, S. N., Luo, Z. P., & Hartwig, K. T.
(2004).
The effect of temperature and extrusion speed on the consolidation of zirconium-based metallic glass powder using equal-channel angular extrusion. Metallurgical and Materials Transactions A.
35A(1), 247-256.
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Wei, Q., Jiao, T., Mathaudhu, S. N., Ma, E., Hartwig, K. T., & Ramesh, K. T.
(2003).
Microstructure and mechanical properties of tantalum after equal channel angular extrusion (ECAE). 358(1-2), 266-272.
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Salem, H. G., Goforth, R. E., & Hartwig, K. T.
(2003).
Influence of intense plastic straining on grain refinement, precipitation, and mechanical properties of Al-Cu-Li-based alloys. Metallurgical and Materials Transactions A.
34 A(5), 1153-1161.
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Field, R. D., Hartwig, K. T., Necker, C. T., Bingert, J. F., & Agnew, S. R
(2002).
Equal-channel angular extrusion of beryllium. Metallurgical and Materials Transactions A.
33(13), 965-972.
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Field, R. D., Necker, C. T., Hartwig, K. T., Bingert, J. F., & Agnew, S. R.
(2002).
Equal-channel angular extrusion of beryllium. Metallurgical and Materials Transactions A.
33(3), 965-972.
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Yavuz, M., Ertekin, A., O'Brien, T., Soika, R., McIntyre, P. M., Rathnayaka, K., Naugle, D., & Hartwig, T.
(2001).
Solid solubility limit of Bi-Pb-Sr-Ca-Mn-O in Bi-Pb-Sr-Ca-Cu-O superconductors. IEEE Transactions on Applied Superconductivity.
11(1), 3446-3448.
-
Parasiris, A., & Hartwig, K. T
(2001).
Consolidation of tungsten carbide-cobalt by extrusion. Metal Powder Report.
56(3), 34.
-
Parasiris, A., Hartwig, K. T., & Srinivasan, M. N.
(2000).
Formation/consolidation of WC-Co cermets by simple shear. 42(9), 875-880.
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Parasiris, A., & Hartwig, K. T.
(2000).
Consolidation of advanced WC-Co powders. 18(1), 23-31.
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Gibbs, M. A., Hartwig, K. T., Cornwell, L. R., Goforth, R. E., & Payzant, E. A.
(1998).
Texture formation in bulk iron processed by simple shear. 39(12), 1699-1704.
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Gillenwater, M. W., Hartwig, K. T., & Hua, C. Y
(1998).
Eddy current decay and resistivity measurements on longitudinally grooved high-purity aluminum bars. Journal of Testing and Evaluation.
26(4), 320-328.
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Segal, V. M., Hartwig, K. T., & Goforth, R. E.
(1997).
In situ composites processed by simple shear. 224(1-2), 107-115.
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Ferrasse, S., Segal, V. M., Hartwig, K. T., & Goforth, R. E.
(1997).
Development of a submicrometer-grained microstructure in aluminum 6061 using equal channel angular extrusion. Journal of Materials Research.
12(5), 1253-1261.
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Ferrasse, S., Segal, V. M., Hartwig, K. T., & Goforth, R. E.
(1997).
Microstructure and properties of copper and aluminum alloy 3003 heavily worked by equal channel angular extrusion. Metallurgical and Materials Transactions A.
28(4), 1047-1057.
-
Hua, C. Y., McDonald, L. C., & Hartwig, K. T
(1997).
Eddy current decay resistivity measurements using a digital voltmeter. Journal of Testing and Evaluation.
25(1), 41-48.
-
Cornwell, L. R., Hartwig, K. T., Goforth, R. E., & Semiatin, S. L.
(1996).
The equal channel angular extrusion process for materials processing. 37(5), 295-300.
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SEMIATIN, S. L., SEGAL, V. M., GOETZ, R. L., GOFORTH, R. E., & HARTWIG, T.
(1995).
WORKABILITY OF A GAMMA-TITANIUM ALUMINIDE ALLOY DURING EQUAL CHANNEL ANGULAR EXTRUSION. 33(4), 535-540.
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MCDONALD, L. C., HARTWIG, K. T., & TAKAHASHI, A.
(1995).
MICROALLOYED ALUMINUM FOR CRYOGENIC CONDUCTORS. JOM.
47(2), 41-43.
-
MCDONALD, L. C., & HARTWIG, K. T
(1991).
CRYOGENIC CREEP TESTING. Journal of Testing and Evaluation.
19(2), 107-114.
-
HARTWIG, K. T., HUA, C. Y., & MCDONALD, L. C.
(1991).
EFFECT OF PRIMARY COIL SIZE ON EDDY-CURRENT DECAY RESISTIVITY MEASUREMENTS. 31(3), 153-158.
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RICHARDS, G. L., & HARTWIG, K. T.
(1990).
A SIMPLIFIED METHOD FOR DETERMINING RELAXATION-TIME AND ELECTRICAL-RESISTIVITY FROM EDDY-CURRENT DECAY MEASUREMENTS. Journal of Testing and Evaluation.
18(6), 454-457.
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HARTWIG, K. T., GEHAN, J. T., & RICHARDS, G. L.
(1989).
CALCULATIONS OF PLASTIC STRAIN AND RESISTIVITY INCREASE IN A COMPOSITE CONDUCTOR SUBJECTED TO CYCLIC STRAIN. IEEE Transactions on Magnetics.
25(2), 1960-1963.
-
HUA, C. Y., & HARTWIG, K. T.
(1989).
MEASUREMENT OF ELECTRICAL-RESISTIVITY IN HIGH MAGNETIC-FIELDS BY THE EDDY-CURRENT DECAY METHOD. Cryogenics.
29(10), 978-981.
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Hartwig, K., & Yuan, G
(1987).
Energy loss, anisotropy, magnetoresistivity and recovery in aluminum strained at 4.2 K. IEEE Transactions on Magnetics.
23(2), 1409-1412.
-
Hartwig, K., Yuan, G., & Lehmann, P
(1985).
The effects of low temperature fatigue on the RRR and strength of pure aluminum. IEEE Transactions on Magnetics.
21(2), 161-164.
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Lehmann, P., Yuan, G. S., & Hartwig, K. T.
(1985).
Grip for fatigue testing pure aluminium. Cryogenics.
25(3), 164-165.
-
Hartwig, K. T., & Worzala, F. J.
(1981).
Resistivity and strength of precipitation-hardened dilute AlAu alloys. IOP Conference Series: Materials Science and Engineering.
48(1), 41-51.
-
Van Sciver, S. W., & Hartwig, K. T.
(1980).
Boundary Resistance in Aluminum-Stabilized Conductors. Advances in cryogenic engineering.
26, 499-504.
-
Hartwig, K. T., Saffari-Kermani, A. A., & Perepezko, J. H.
(1980).
MECHANICAL BEHAVIOR OF DILUTE ALUMINIUM ALLOYS FOR LOW TEMPERATURE, HIGH CONDUCTIVITY APPLICATIONS. 675-680.
-
Hartwig, K. T., & Van Sciver, S. W
(1979).
PROPERTIES OF JOINTS IN COMPOSITE SPECIMENS OF ALUMINUM AND COPPER. 4, 1794-1796.
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Mizutani, U., Hartwig, K. T., Massalski, T. B., & Hopper, R. W.
(1978).
Low-Temperature Specific Heats of Glassy Pd
1-x-y Six Cuy Alloys. Physical Review Letters. 41(9), 661-664.
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Haimson, B. C., Hartwig, K. T., & Doe, T. W.
(1978).
Underground caverns for energy storage using superconductive magnets. Underground Space.
2(3), 137-142.
-
Tachikawa, K., Burt, R. J., & Hartwig, K. T.
(1977).
Formation of superconducting A -15 V3Ge compound by a composite-diffusion process. 48(8), 3623-3625.
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Hartwig, K. T., Cui, H. J., & Goforth, R. E.
The Three-Dimensional Simulation of Flow Pattern in Equal-Channel Angular Extrusion. Journal of Metals.
50(8),
-
Levin, Z. S., Wang, X., Kaynak, M., Karaman, I., & Hartwig, K. T.
(2019).
Strength and ductility of powder consolidated ultrafine-grain tantalum. International Journal of Refractory Metals and Hard Materials.
80, 73-84.
-
chapter
-
Viswanathan, S., Saha, P., Foley, D., & Hartwig, K. T.
(2011).
ENGINEERING A MORE EFFICIENT ZIRCONIUM GRAIN REFINER FOR MAGNESIUM. Magnesium Technology -Symposium-.
Magnesium Technology 2011.
(pp. 559-564).
Wiley.
-
Summers, T., Segal, V. M., Hartwig, K. T., Goforth, R. E., Walsh, R. P., & Pernambuco-Wise, P.
(1996).
ECAE-Processed Cu-Nb and Cu-Ag Nanocomposite Wires for Pulse Magnet Applications. Advances in cryogenic engineering.
Summers, L. T. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 499-505).
Springer Nature.
-
McDonald, L. C., Hartwig, K. T., & Zou, H.
(1996).
Effects of Grain Size and Purity on the Low Temperature Cyclic Strain Degradation of Stabilizer Aluminum. Advances in cryogenic engineering.
Summers, L. T. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 1057-1062).
Springer Nature.
-
Watts, L. C., Boulios, K., Hartwig, K. T., & Huson, F. R.
(1996).
Support System Design Incorporating Carbon/Epoxy Tension Straps for a Four Tesla, One Meter Bore, MRI Magnet. Advances in cryogenic engineering.
Kittel, P. (Eds.),
Advances in Cryogenic Engineering.
(pp. 457-463).
Springer Nature.
-
McDonald, L. C., & Hartwig, K. T.
(1992).
1100 Hour Creep Test Results for OFHC Copper: Validation of Previously Published Results. Advances in cryogenic engineering.
Fickett, F. R., & Reed, R. P. (Eds.),
Materials.
(pp. 127-132).
Springer Nature.
-
Lumbis, A., Roelli, J., Frutschi, D., Gehan, J. T., & Hartwig, K. T.
(1990).
Cryoconductor Materials Testing System. Advances in cryogenic engineering.
Reed, R. P., & Fickett, F. R. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 701-708).
Springer Nature.
-
Hartwig, K. T., Lumbis, A., & Roelli, J.
(1990).
Cyclic-Strain Resistivity in Pure Aluminum at 20 K. Advances in cryogenic engineering.
Reed, R. P., & Fickett, F. R. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 725-732).
Springer Nature.
-
Hartwig, K. T., & DeFrese, R. J.
(1990).
Mechanical and Electrical Testing of Composite Aluminum Cryoconductors. Advances in cryogenic engineering.
Reed, R. P., & Fickett, F. R. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 709-715).
Springer Nature.
-
Gehan, J. T., & Hartwig, K. T.
(1990).
Total Plastic Strain and Electrical Resistivity in High Purity Aluminum Cyclically Strained at 4.2 K. Advances in cryogenic engineering.
Reed, R. P., & Fickett, F. R. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 717-723).
Springer Nature.
-
McDonald, L. C., & Hartwig, K. T.
(1990).
Creep of pure aluminum at cryogenic temperatures. Advances in cryogenic engineering.
(pp. 1135-1141).
-
Hartwig, K. T., Zolliker, P., Yu, D., Van Sciver, S. W., & Khalil, A.
(1982).
Fabrication and Performance of an Aluminum-Stabilized Composite Superconductor. Advances in cryogenic engineering.
Reed, R. P., & Clark, A. F. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 805-813).
Springer Nature.
-
Hartwig, K. T.
(1981).
An Eddy-Current Decay Technique for Low-Temperature Resistivity Measurements. Birnbaum, G., & Free, G. (Eds.),
Eddy-Current Characterization of Materials and Structures.
(pp. 157-157-16-172).
ASTM International.
-
Hartwig, K. T., & Saffari-Kermani, A. A.
(1980).
Characterization of Several Aluminum Alloys for Moderate-Strength High-Conductivity Applications. Clark, A. F., & Reed, R. P. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 621-624).
Springer Nature.
-
Hartwig, K. T.
(1980).
Fabrication Studies of a Strengthened Al/Nb-Ti Composite Conductor. Clark, A. F., & Reed, R. P. (Eds.),
Advances in Cryogenic Engineering Materials.
(pp. 494-498).
Springer Nature.
-
Viswanathan, S., Saha, P., Foley, D., & Hartwig, K. T.
(2011).
ENGINEERING A MORE EFFICIENT ZIRCONIUM GRAIN REFINER FOR MAGNESIUM. Magnesium Technology -Symposium-.
Magnesium Technology 2011.
(pp. 559-564).
Wiley.
-
conference paper
-
Davis, B., Hartwig, K. T., Liang, S. Y., & Huang, Y.
(2016).
EVALUATION OF CHIP MORPHOLOGY DURING MACHINING OF ECAE TITANIUM. 418-421.
-
Hartwig, K. T., Balachandran, S., Mezyenski, R., Seymour, N., Robinson, J., & Barber, R. E.
(2014).
Fabrication of Fine-grain Tantalum Diffusion Barrier Tube for Nb3Sn Conductors. AIP Conference Proceedings.
204-210.
-
Balachandran, S., Seymour, N., Mezyenski, R., Barber, R., & Hartwig, K. T.
(2014).
Microstructure and mechanical properties of fine grain seamless Nb tube by a novel shear deformation process. AIP Conference Proceedings.
197-203.
-
Pan, Z., Ying, W., Wei, Q., Xu, F., Zhang, X., Hartwig, K. T., Kecskes, L., & Mathaudhu, S
(2011).
High-strain rate behavior of nanostructured niobium processed by severe plastic deformation to very large strains. 929-935.
-
Cox, M. E., Mathaudhu, S. N., Hartwig, K. T., & Dunand, D. C.
(2010).
Amorphous Zr-Based Foams with Aligned, Elongated Pores. Metallurgical and Materials Transactions A.
1706-1713.
-
Al-Maharbi, M., Foley, D., Karaman, I., Beyerlein, I., Hartwig, K. T., Kecskes, L. J., & Mathaudhu, S.
(2010).
Importance of Crystallographic Texture of AZ31B on Flow Stress Anisotropy and Tension-Compression Asymmetry. Magnesium Technology -Symposium-.
445-+.
-
Foley, D. C., Al-Maharbi, M., Karamar, I., Hartwig, T., Kecskes, L. J., & Mathaudhu, S.
(2010).
MECHANICAL BEHAVIOR OF AZ31 DUE TO TEXTURE AND MICROSTRUCTURE. Magnesium Technology -Symposium-.
451-+.
-
Renzetti, R. A., Sandim, M., Sandim, H., Hartwig, K. T., Bernardi, H. H., & Raabe, D.
(2010).
EBSD Characterization of Pure Iron Deformed by ECAE. Materials Science Forum.
1995-+.
-
Balachandran, S., Barber, R. E., Huang, Y., Miao, H., Parrell, J. A., Hong, S., Griffin, R. B., & Hartwig, K. T.
(2010).
FINE GRAINED NB FOR INTERNAL TIN NB3SN CONDUCTORS. AIP Conference Proceedings.
216-+.
-
Mathaudhu, S. N., deRosset, A. J., Hartwig, K. T., & Kecskes, L. J.
(2009).
Microstructures and recrystallization behavior of severely hot-deformed tungsten. Materials Science & Engineering: A.
28-31.
-
Foley, D. C., Hartwig, K. T., Maloy, S. A., Hosemann, P., & Zhang, X.
(2009).
Grain refinement of T91 alloy by equal channel angular pressing. Journal of Nuclear Materials.
221-224.
-
Hartwig, K. T., Balachandran, S., Griffin, R. B., Mathaudhu, S. N., Pyon, T., & Barber, R. E
(2008).
Tantalum sheet with improved copper-tantalum co-deformability. 946-954.
-
Foley, D. C., Barber, R. E., Im, J., Onipede, B., & Hartwig, K. T.
(2008).
Evaluation of reshaping methods for multi-pass Equal Channel Angular Extrusion. Materials Science Forum.
63-67.
-
Balachandran, S., Hartwig, K. T., & Griffin, R. B.
(2008).
A method for measuring interface roughening. AIP Conference Proceedings.
333-340.
-
Wei, Q., Schuster, B. E., Mathaudhu, S. N., Hartwig, K. T., Kecskes, L. J., Dowding, R. J., & Ramesh, K. T.
(2008).
Dynamic behaviors of body-centered cubic metals with ultrafine grained and nanocrystalline microstructures. Materials Science & Engineering: A.
58-64.
-
Hartwig, K. T., Balachandran, S., Mathaudhu, S. N., Barber, R. E., Pyon, T., & Griffin, R. B.
(2008).
Interface roughness in copper-tantalum wire and Nb3Sn superconductor composites. AIP Conference Proceedings.
325-+.
-
Pan, Z., Guo, Y. Z., Mathaudhu, S. N., Kecskes, L. J., Hartwig, K. T., & Wei, Q.
(2008).
Quasi-static and dynamic mechanical properties of commercial-purity tungsten processed by ECAE at low temperatures. Journal of Materials Science.
7379-7384.
-
Mathaudhu, S. N., Hartwig, K. T., & Barber, R. E.
(2007).
Fine grained tantalum for composite Nb3Sn superconductor diffusion barrier sheet. IEEE Transactions on Applied Superconductivity.
2660-2663.
-
Hartwig, K. T., Wang, J., Baars, D. C., Bieler, T. R., Mathaudhu, S. N., & Barber, R. E.
(2007).
Microstructural refinement of niobium for superconducting RF cavities. IEEE Transactions on Applied Superconductivity.
1305-1309.
-
Mathaudhu, S. N., & Hartwig, K. T.
(2007).
Processing microstructure property relationships in severely deformed tantalum. Materials Science & Engineering: A.
94-100.
-
Im, J., Hartwig, K. T., & Sharp, J.
(2007).
Processing of Bi90Sb10 by Equal Channel Angle Extrusion. 408-412.
-
Hartwig, K. T., Mathaudhu, S. N., & Barber, R. E
(2006).
Microstructural refinement of tantalum by severe plastic deformation. 208-215.
-
Im, J. T., Hartwig, K. T., & Sharp, J
(2006).
Microstructure and texture of cast Bi
x Sb1-x alloy processed by angular reduction extrusion. 375.
-
Mathaudhu, S. N., Hartwig, K. T., Barber, R. E., & Pyon, T.
(2006).
Tantalum sheet for superconductor diffusion barrier applications. AIP Conference Proceedings.
590-+.
-
Kadri, S. J., & Hartwig, K. T.
(2006).
Recrystallized grain size in severely deformed pure copper. Materials Science Forum.
349-354.
-
Bansal, S., Saxena, A., Hartwig, T., & Tummala, R. R
(2005).
Fatigue and fracture behavior of nanocrystalline copper and nickel. 4736-4741.
-
Mathaudhu, S. N., Barber, R. E., & Hartwig, K. T.
(2005).
Microstructural refinement of tantalum for Nb3Sn superconductor diffusion barriers. IEEE Transactions on Applied Superconductivity.
3434-3437.
-
Mathaudhu, S. N., Blum, S., Barber, R. E., & Hartwig, K. T.
(2005).
Severe plastic deformation of bulk Nb for Nb3Sn superconductors. IEEE Transactions on Applied Superconductivity.
3438-3441.
-
Bansal, S., Saxena, A. M., Hartwig, T., & Tummala, R. R.
(2005).
Mechanical Properties of ECAE Nanocrystalline Copper and Nickel. Journal of Metastable and Nanocrystalline Materials.
183-186.
-
Ingole, S., Kadri, S., Liang, H., & Hartwig, K.
(2005).
Studying Shear Behavior of Ductile Metals Using an Atomic Force Microscope. 925-926.
-
Griffin, R. B., & Hartwig, K. T
(2005).
Development of a standardized laboratory exam for a materials and manufacturing course. ASEE Annual Conference and Exposition, Conference Proceedings.
4381-4388.
-
Haouaoui, M., Karaman, I., Maier, H. J., & Hartwig, K. T.
(2004).
Microstructure evolution and mechanical behavior of bulk copper obtained by consolidation of micro- and nanopowders using equal-channel angular extrusion. Metallurgical and Materials Transactions A.
2935-2949.
-
Barber, R. E., Dudo, T., Yasskin, P. B., & Hartwig, K. T.
(2004).
Product yield of ECAE processed material. 667-672.
-
Hartwig, K. T., Bryant, D. O., Mathaudhu, S. N., Barber, R. E., & Im, J. T.
(2004).
Grain refinement of niobium by severe plastic deformation. AIP Conference Proceedings.
441-449.
-
Kecskes, L. J., Szewczyk, S. T., Woodman, R. H., Barber, R. E., & Hartwig, K. T.
(2004).
Processing of aluminum nickelides by equal-channel angular extrusion. 327-332.
-
Mathaudhu, S. N., Im, J. T., Barber, R. E., Anderson, I. E., Karaman, I., & Hartwig, K. T.
(2003).
Progress in consolidation of amorphous Zr-based powder into bulk metallic glass. MRS Online Proceedings Library.
191-198.
-
Hartwig, K. T., Chase, G., & Belan, J.
(2003).
Novel particulate reinforced tin for tubular Nb3Sn multifilamentary superconductors. IEEE Transactions on Applied Superconductivity.
3548-3552.
-
Robertson, J., Im, J. T., Karaman, I., Hartwig, K. T., & Anderson, I. E.
(2003).
Consolidation of amorphous copper based powder by equal channel angular extrusion. Journal of Non-Crystalline Solids.
144-151.
-
Kaculi, X., Srinivasan, M. N., & Hartwig, K. T.
(2003).
Use of High Intensity Milling and Equal Channel Angular Extrusion to Produce and Consolidate Nanostructured Titanium Silicide. 871-877.
-
Kaculi, X. T., Srinivasan, M. N., & Hartwig, K. T.
(2003).
Use of mechanical alloying and equal channel angular extrusion to produce nanostructured titanium silicide. 315-329.
-
Field, R. D., Hartwig, K. T., Necker, C. T., Bingert, J. F., & Agnew, S. R.
(2002).
Equal-channel angular extrusion of beryllium. Metallurgical and Materials Transactions A.
965-972.
-
Hartwig, K. T., Mathaudhu, S. N., Maier, H. J., & Karaman, I.
(2002).
Hardness and microstructure changes in severely deformed and recrystallized tantalum. 151-160.
-
Hartwig, K. T., Zapata, H., Parasiris, A., & Mathaudhu, S. N.
(2001).
Consolidation of metallic powders by equal channel angular extrusion. 211-221.
-
Griffin, R. B., Epps, A. L., & Hartwig, K. T.
(2001).
Laboratory activities used in a sophomore materials science course at Texas A&M university. MRS Online Proceedings Library.
155-162.
-
Salem, H. G., Goforth, R. E., & Hartwig, K. T.
(1998).
Superplastic characterization of 2095 Al-Li alloy processed by equal channel angular extrusion. 165-178.
-
Takahashi, A., McDonald, L. C., Yasuda, H., & Hartwig, K. T.
(1997).
Micro-alloyed high-purity aluminum for low-temperature conductor applications. Physica Status Solidi (a).
413-418.
-
Goforth, R. E., Segal, V. M., Hartwig, K. T., & Ferrasse, S
(1995).
Production of submicron-grained structure in aluminum 3003 by ECAE. 25-32.
-
HARTWIG, K. T., MCDONALD, L. C., HARPER, J. D., & HUA, C. Y.
(1995).
RRR MEASUREMENTS ON A SMES-ETM MOCKUP SUPERCONDUCTOR. IEEE Transactions on Applied Superconductivity.
307-310.
-
SUNDBY, P. C., & HARTWIG, K. T.
(1994).
ANNEALING STUDY ON ALUMINUM COMPOSITE CRYOCONDUCTORS. Advances in cryogenic engineering.
685-691.
-
MCDONALD, L. C., & HARTWIG, K. T.
(1994).
EDDY-CURRENT DETERMINATION OF THE EFFECTS OF CYCLIC STRAIN AND TEMPERATURE ON THE MAGNETORESISTIVITY OF PURE ALUMINUM. Advances in cryogenic engineering.
701-708.
-
MCDONALD, L. C., & HARTWIG, K. T.
(1994).
ELECTRICAL AND MECHANICAL-BEHAVIOR OF MICRO-ALLOYED ALUMINUM (RRR-GREATER-THAN-2500) AT 4.2 K. Advances in cryogenic engineering.
693-700.
-
HARTWIG, K. T., & ZOU, H.
(1994).
RESIDUAL RESISTIVITY MEASUREMENTS ON HIGH RRR ALUMINUM BY THE EDDY-CURRENT DECAY METHOD. Advances in cryogenic engineering.
443-450.
-
HUA, C. Y., HARPER, J., & HARTWIG, K. T.
(1994).
RESISTIVITY AND RRR MEASUREMENTS ON GROOVED SMES ALUMINUM STABILIZER BAR BY THE EDDY-CURRENT DECAY METHOD. Advances in cryogenic engineering.
669-675.
-
Surovik, W. J., Gulde, R. J., Bray, D. E., & Hartwig, K. T
(1993).
Shell thickness measurements in composite conductors using ultrasonics. 13-16.
-
SEGAL, V. M., GOFORTH, R. E., & HARTWIG, K. T
(1993).
THE APPLICATION OF EQUAL CHANNEL ANGULAR EXTRUSION TO PRODUCE EXTRAORDINARY PROPERTIES IN ADVANCED METALLIC MATERIALS. 971-974.
-
Parakh, Z. K., & Hartwig, K. T
(1992).
Composite electrical conductors. 57-63.
-
DeFrese, R. J., & Hartwig, K. T
(1991).
Characteristics of composite electrical conductors for use at cryogenic temperatures. 37-40.
-
Hartwig, K. T., Yuan, G. S., & Lehmann, P.
(1986).
Strain Resistivity at 4.2 K in Pure Aluminum. Advances in cryogenic engineering.
405-412.
-
Yuan, G. S., Lehmann, P., & Hartwig, K. T.
(1986).
The Effect of Prestrain on Low Temperature Fatigue Induced Resistivity in Pure Aluminum. Advances in cryogenic engineering.
413-419.
-
Eyssa, Y. M., Boom, R. W., Hartwig, K. T., McIntosh, G. E., Van Sciver, S. W., & Bischke, R. F
(1981).
SUPERCONDUCTIVE MAGNETIC ENERGY STORAGE FOR ELECTRIC UTILITY LOAD LEVELING. Intersociety Energy Conversion Engineering Conference.
920-924.
-
Larbalestier, D. C., Hartwig, K. T., West, A. W., & Moffat, D. L
(1980).
CONDUCTOR DESIGN AND DEVELOPMENT FOR SUPERCONDUCTING MAGNETIC ENERGY STORAGE MAGNETS. 287-295.
-
Van Sciver, S. W., Han, K. T., Hartwig, K. T., McIntosh, G. F., & Young, W. C
(1980).
CONDUCTOR ND STRUCTURAL COMPONENT - STUDIES FOR DIURNAL ENERGY STORAGE. 279-286.
-
Hartwig, K. T., & Appius, P. G
(1980).
STRENGTH AND ELECTRICAL RESISTANCE OF COLD DRAWN Al AND Cu. Proceedings of the International Cryogenic Engineering Conference.
720-725.
-
Hartwig, K. T., & Worzala, F. J
(1976).
DILUTE ALUMINIUM ALLOYS: THEIR POTENTIAL IN SUPERCONDUCTING DEVICES. 406-410.
-
Allen, T. R., Sridharan, K., Ren, X., Tan, L., Chen, Y., Foley, D. C., Hartwig, K. T., & Zhang, X.
Oxidation performance in supercritical water. 1714-1722.
-
Davis, B., Hartwig, K. T., Liang, S. Y., & Huang, Y.
(2016).
EVALUATION OF CHIP MORPHOLOGY DURING MACHINING OF ECAE TITANIUM. 418-421.
Research
principal investigator on
- High Strength and High Ductility Martensitic Steels awarded by National Science Foundation - (Arlington, Virginia, United States) 2016 - 2020
- Collaborative Research: Understanding Machining Induced Microstructure Changes to Ti for Implant Applications awarded by National Science Foundation - (Arlington, Virginia, United States) 2014 - 2017
co-principal investigator on
Teaching
teaching activities
- MEEN485 Directed Studies Instructor
- MEEN491 Hnr-research Instructor
- MEEN653 Scientific Writing Instructor
- MEEN684 Professional Internship Instructor
- MEEN685 Directed Studies Instructor
- MEEN691 Research Instructor
- MSEN222 Material Science Instructor
- MSEN380 Communicating Matls Sci Eng Instructor
- MSEN684 Prof Intern: In-absentia Instructor
- MSEN689 Sptp: Research & Writing Instructor
- MSEN691 Research Instructor
Works By Students
chaired theses and dissertations
-
Balachandran, Shreyas (2015-04). Microstructure Development in Bulk Niobium Following Severe Plastic Deformation and Annealing.
-
Bryant, Don O. (2007-04). Grain refinement of cast niobium via equal channel angular extrusion/annealing.
-
Foley, David Christopher (2014-07). Texture Control by Selective Deformation Mechanism Activation in Magnesium Alloy.
-
Kadri, Shabibahmed Jehangir (2006-10). Microstructural breakdown and scale-up effects in equal channel angular extrusion of cast copper.
-
Kao, Yi-Tang (2014-12). Effect of Severe Plastic Deformation and Subsequent Heat Treatment on Hardness and Electrical Conductivity of Oxygen-Free High Conductivity (OFHC) Copper, Commercial Pure Copper, and Copper Chromium Alloy.
-
Li, Jin (2017-08). Mechanical Behavior and Irradiation Response in Nanostructured Metals with Low Stacking Fault Energy.
-
Mathaudhu, Suveen Nigel (2006-10). Fabrication of amorphous metal matrix composites by severe plastic deformation.
-
Murudkar, Rahul R. (2010-10). Development of a Continuous Equal Channel Angular Extrusion (ECAE) Process.
-
Onipede, Bolarinwa O. (2007-04). Design of a cross section reduction extrusion tool for square bars.
-
Song, Miao (2014-08). Mechanical Properties, Thermal Stability and Radiation Damage of Ferritic Steels Processed by Thermal Mechanical Treatments.
-
Springs, Jason Cole (2017-08). Mechanical Properties, Microstructure, and Electrical Resistivity of ECAE Processed OFHC Copper for High Strength and High Conductivity Applications.
-
Vasiraju, Venkata 1987- (2012-05). Equal Channel Angular Extrusion of Tungsten Heavy Alloy.
Background
education and training
- Ph.D. in Metallurgical Engineering, University of Wisconsin - Madison - (Madison, Wisconsin, United States) 1977
- M.S. in Nuclear Engineering, University of Wisconsin - Madison - (Madison, Wisconsin, United States) 1970
- B.S. in Nuclear Engineering, University of Wisconsin - Madison - (Madison, Wisconsin, United States) 1969
- Carnegie Mellon University - (Adelaide, South Australia, Australia) , Postdoctoral Training 1978
Contact
first name
- Karl
has last name
- Hartwig
mailing address
-
Texas A&M University
Materials Science & Engineering
3003 TAMU
College Station, TX 77843-3123
USA
Other
- thartwig@tamu.edu