A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates

Xu, W. and Rivera-Díaz-Del-Castillo, P. E.J. and Yan, W. and Yang, K. and San Martín, D. and Kestens, L. A.I. and Van Der Zwaag, S. (2010) A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates. Acta Materialia, 58 (11). pp. 4067-4075. ISSN 1359-6454

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Abstract

A general computational alloy design approach based on thermodynamic and physical metallurgical principles and coupled with a genetic optimization scheme is presented. The model is applied to develop a new ultrahigh-strength maraging stainless steel. The alloy composition and heat treatment parameters are integrally optimized so as to achieve microstructures of fully lath martensite matrix strengthened by multiple precipitates of MC carbides, Cu particles and Ni3Ti intermetallics. The combined mechanical properties, corrosion resistance and identification of actual strengthening precipitates in the experimental prototype produced on the basic of the model predictions provide a strong justification for the alloy design approach.

Item Type:
Journal Article
Journal or Publication Title:
Acta Materialia
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500/2506
Subjects:
ID Code:
125518
Deposited By:
Deposited On:
25 May 2018 09:14
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Oct 2020 06:09