Microstructural refinement in an ultra-high strength martensitic steel via equal channel angular pressing Academic Article

abstract

• 2018 In this work, a CALPHAD thermodynamic model is used to assess the thermodynamic stability of austenite in an Ultra-High Strength Martensitic Steel (i.e., Eglin Steel) in order to refine parent austenite-grain sizes, via high temperature equal-channel angular pressing (ECAP). The parent austenite-grain sizes are reduced from 188 m to 14.8 m, which in turn, led to the refinement of martensite lath sizes. This approach produced a yield strength of 1.68 GPa, ultimate strength of 1.98 GPa, and an elongation of 16.1%. Overall, this method reduced development cycle times and achieved alloy performance on par with Ni-Co secondary hardening steels.

authors

• Arroyave, Raymundo
• Karaman, Ibrahim

published proceedings

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

author list (cited authors)

• Gibbons, S. L., Abrahams, R. A., Vaughan, M. W., Barber, R. E., Harris, R. C., Arroyave, R., & Karaman, I.

citation count

• 21

complete list of authors

• Gibbons, SL||Abrahams, RA||Vaughan, MW||Barber, RE||Harris, RC||Arroyave, R||Karaman, I

publication date

• January 2018

publisher

• Elsevier  Publisher

published in

• Materials Science & Engineering: A  Journal

keywords

• CALPHAD
• Equal Channel Angular Pressing
• Grain Refinement
• Martensitic Steel
• Ultra-high Strength Steel

Digital Object Identifier (DOI)

• 10.1016/j.msea.2018.04.005

start page

• 57

end page

• 64

volume

• 725

URL

• http://dx.doi.org/10.1016/j.msea.2018.04.005