Thermal stability of ultrafine grained Fe-Cr-Ni alloy Academic Article uri icon

abstract

  • Equal channel angular pressing was used to refine the microstructure of a Fe-14Cr-16Ni (wt.%) alloy. The as-processed alloy had predominantly equiaxed austenite fine grains with an average grain size of 0.4. m and a low fraction of deformation induced martensite. Ex situ isothermal annealing experiments showed the fine microstructure was thermally stable up to 673. K, and abnormal grain growth occurred at ~873. K. In situ annealing studies in a transmission electron microscope revealed the coarsening of grains. Analysis of grain growth kinetics from 873 to 1073. K yielded average activation energy of grain growth to be ~207. kJ/mol. The grain growth mechanisms and annealing induced evolution of mechanical properties were discussed. 2012 Elsevier B.V..

published proceedings

  • MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

author list (cited authors)

  • Sun, C., Yang, Y., Liu, Y., Hartwig, K. T., Wang, H., Maloy, S. A., Allen, T. R., & Zhang, X.

citation count

  • 28

complete list of authors

  • Sun, C||Yang, Y||Liu, Y||Hartwig, KT||Wang, H||Maloy, SA||Allen, TR||Zhang, X

publication date

  • January 2012