Charting the ‘composition–strength’ space for novel austenitic,martensitic and ferritic creep resistant steels

作     者：Qi Lu Sybrand van der Zwaag Wei Xu 

作者机构：State Key Laboratory of Rolling and Automation Northeastern University Novel Aerospace Materials group Faculty of Aerospace Engineering Delft University of Technology China Science Laboratory General Motors Global Research and Development 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第12期

页      面：1577-1581页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：financial support from the Chinese Scholarship Council(CSC)and internal funding of TU Delft 

主　　题：Alloy design Precipitation hardening Coarsening rate Solid solution strengthening Matrix 

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.