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

被引：102
|
作者：
Xu, W. [1 ,2 ]
Rivera-Diaz-del-Castillo, P. E. J. [2 ]
Yan, W. [3 ]
Yang, K. [3 ]
San Martin, D. [4 ]
Kestens, L. A. I. [5 ]
van der Zwaag, S. [2 ]
机构：
[1] Mat Innovat Inst M2i, NL-2629 HS Delft, Netherlands
[2] Delft Univ Technol, Fac Aerosp Engn, Novel Aerosp Mat NovAM Grp, NL-2629 HS Delft, Netherlands
[3] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
[4] Ctr Nacl Invest Met CENIM CSIC, Dept Met Phys, Mat Grp, Madrid 28040, Spain
[5] Univ Ghent, Dept Mat Sci & Engn, B-9052 Ghent, Belgium
来源：
ACTA MATERIALIA | 2010年 / 58卷 / 11期
关键词：
Maraging steels; Stainless steels; Thermodynamics; Precipitation; Alloy design; FREE MARAGING-STEEL; MECHANICAL-PROPERTIES; MARTENSITIC STEELS; PRECIPITATION; MICROSTRUCTURE; THERMODYNAMICS; OPTIMIZATION; TEMPERATURE; DUCTILITY; KINETICS;
D O I：
10.1016/j.actamat.2010.03.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：4067 / 4075
页数：9
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