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Computational design of UHS maraging stainless steels incorporating composition as well as austenitisation and ageing temperatures as optimisation parameters |
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| Authors: | W Xu PEJ Rivera-Díaz-del-Castillo S van der Zwaag |
| Affiliation: | 1. Materials Innovation Institute M2i , Kluyverweg 1, 2629, HS, Delft, The Netherlands;2. Fundamentals of Advanced Materials Group, Faculty of Aerospace Engineering , Delft University of Technology , Kluyverweg 1, 2629, HS, Delft, The , Netherlands w.xu@tudelft.nl;4. Fundamentals of Advanced Materials Group, Faculty of Aerospace Engineering , Delft University of Technology , Kluyverweg 1, 2629, HS, Delft, The , Netherlands |
| Abstract: | An extended integral alloy design approach for the development of new ultra high strength maraging steels is presented, which incorporates not only chemical composition effects but also criteria accounting for the influence of the entire heat treatment. The approach considers the desired strengthening precipitates formed during the final ageing treatment as well as undesirable equilibrium phases present during the preceding high temperature homogenisation treatment. The results are compared with the predictions of a previous model, which considered the combination of composition and final precipitation tempering stage only. |
| Keywords: | maraging steels composition precipitation carbide δ-ferrite thermodynamics genetic algorithm alloy design |
