Charting the ‘composition–strength’ space for novel austenitic,martensitic and ferritic creep resistant steels
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2017年第12期
论文作者：Qi Lu Sybrand van der Zwaag Wei Xu
文章页码：1577 - 1581
摘 要：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.
Qi Lu1,2,3，Sybrand van der Zwaag2，Wei Xu1,2
1. State Key Laboratory of Rolling and Automation, Northeastern University2. Novel Aerospace Materials group, Faculty of Aerospace Engineering, Delft University of Technology3. China Science Laboratory, General Motors Global Research and Development
摘 要：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.
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