Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Genetic design and characterization of novel ultra-high-strength stainless steels strengthened by Ni3Ti intermetallic nanoprecipitates
AU - Xu, W.
AU - Rivera-Díaz-del-Castillo, P. E J
AU - Wang, W.
AU - Yang, K.
AU - Bliznuk, V.
AU - Kestens, L. A I
AU - van der Zwaag, S.
PY - 2010/6
Y1 - 2010/6
N2 - A general computational alloy design approach based on thermodynamic and physical metallurgical principles, and coupled with a genetic optimization scheme, is presented. The method is applied to the design of new ultra-high-strength maraging stainless steels strengthened by Ni3Ti intermetallics. In the first design round, the alloy composition is optimized on the basis of precipitate formation at a fixed ageing temperature without considering other steps in the heat treatment. In the second round, the alloy is redesigned, applying an integrated model which allows for the simultaneous optimization of alloy composition and the ageing temperature as well as the prior austenitization temperature. The experimental characterizations of prototype alloys clearly demonstrate that alloys designed by the proposed approach achieve the desired microstructures.
AB - A general computational alloy design approach based on thermodynamic and physical metallurgical principles, and coupled with a genetic optimization scheme, is presented. The method is applied to the design of new ultra-high-strength maraging stainless steels strengthened by Ni3Ti intermetallics. In the first design round, the alloy composition is optimized on the basis of precipitate formation at a fixed ageing temperature without considering other steps in the heat treatment. In the second round, the alloy is redesigned, applying an integrated model which allows for the simultaneous optimization of alloy composition and the ageing temperature as well as the prior austenitization temperature. The experimental characterizations of prototype alloys clearly demonstrate that alloys designed by the proposed approach achieve the desired microstructures.
KW - Alloy design
KW - Maraging steels
KW - Precipitation
KW - Stainless steels
KW - Thermodynamics
U2 - 10.1016/j.actamat.2010.02.028
DO - 10.1016/j.actamat.2010.02.028
M3 - Journal article
AN - SCOPUS:77950992392
VL - 58
SP - 3582
EP - 3593
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
IS - 10
ER -