A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates
A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates
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DOI：
10.1016/j.actamat.2010.03.005
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发表时间：
2010-06-01
期刊：
影响因子：
9.4
通讯作者：
van der Zwaag, S.
中科院分区：
文献类型：
--
作者：
Xu, W.;Rivera-Diaz-del-Castillo, P. E. J.;van der Zwaag, S.
提出了一种基于热力学和物理冶金学原理并结合遗传优化的通用计算合金设计方法。将该模型应用于一种新型超高强度马氏体时效不锈钢的开发。通过对合金成分和热处理工艺的综合优化，获得了MC碳化物、Cu颗粒和Ni3Ti金属间化合物复合析出强化的板条马氏体组织。综合力学性能，耐腐蚀性和识别的实际强化析出物的实验原型模型预测的基础上产生的合金设计方法提供了一个强有力的理由。(C)2010 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
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.