A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates / W. Xu in Acta materialia, Vol. 58 N° 11 (Juin 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 4067–4075 Titre : A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates Type de document : texte imprimé Auteurs : W. Xu, Auteur ; P.E.J. Rivera-Díaz-del-Castillo, Auteur ; W. Yan, Auteur Année de publication : 2011 Article en page(s) : pp. 4067–4075 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Maraging steels Stainless Thermodynamics Precipitation Alloy design Résumé : 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. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001503 [article] A new ultrahigh-strength stainless steel strengthened by various coexisting nanoprecipitates [texte imprimé] / W. Xu, Auteur ; P.E.J. Rivera-Díaz-del-Castillo, Auteur ; W. Yan, Auteur . - 2011 . - pp. 4067–4075. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 11 (Juin 2010) . - pp. 4067–4075 Mots-clés : Maraging steels Stainless Thermodynamics Precipitation Alloy design Résumé : 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. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science/article/pii/S1359645410001503

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