Charting the 'composition-strength' space for novel austenitic, martensitic and ferritic creep resistant steels

Journal article (2017)

Authors

Q. Lu Novel Aerospace Materials - Aerospace Engineering , General Motors Global Research and Development, Northeastern University China
S. van der Zwaag Novel Aerospace Materials - Aerospace Engineering
W. Xu Northeastern University China, Novel Aerospace Materials - Aerospace Engineering
Research Group
Novel Aerospace Materials (Aerospace Engineering) (TU Delft)
Matrix Precipitation hardening Alloy design Coarsening rate Solid solution strengthening
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Published Date

2017

Language

English

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Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Novel Aerospace Materials

Abstract

We report results of a large computational 'alloy by design' study, in which the 'chemical composition-mechanical strength' space is explored for austenitic, ferritic and martensitic creep resistant steels. The approach used allows simultaneously optimization of alloy composition and processing parameters based on the integration of thermodynamic, thermo-kinetics and a genetic algorithm optimization route. The nature of the optimisation depends on both the intended matrix (ferritic, martensitic or austenitic) and the desired precipitation family. The models are validated by analysing reported strengths of existing steels. All newly designed alloys are predicted to outperform existing high end reference grades.