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Genetic alloy design based on thermodynamics and kinetics

Research output: Contribution to journalJournal article

Published
<mark>Journal publication date</mark>04/2008
<mark>Journal</mark>Philosophical Magazine
Issue number12
Volume88
Number of pages9
Pages (from-to)1825-1833
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A theory-guided computational approach for alloy design is presented. Aimed at optimising the desired properties, the microstructure is designed and an alloy composition optimised accordingly, combining criteria based on thermodynamic, thermokinetic and mechanical principles. A genetic algorithm is employed as the optimisation scheme. The approach is applied to the design of ultra-high strength stainless steels. Three composition scenarios, utilising different strengthening precipitates (carbides, Cu and NiAl/Ni3Ti), are followed. The results are compared to a variety of existing commercial high-end engineering steels, showing that the design strategy presented here may lead to significant improvements in strength beyond current levels.