文献类型：期刊文献

英文题名：Synergizing TWIP and TRIP effects for optimized mechanical performance via stacking fault energy control in austenitic steels

作者：Yuan, Jiahua[1];Wang, Lingyu[1];Wang, Chenchong[1];Dong, Guangqi[1];Wang, Jinliang[2];Li, Yizhuang[1];Hu, Jun[1];Xu, Wei[1]

机构：[1]Northeastern Univ, State Key Lab Digital Steel, Shenyang 110819, Peoples R China;[2]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：25

期号：5-6

外文期刊名：ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001571320400001)、、WOS

基金：This work was financially supported by the National Key Research and Development Program (No. 2024YFB3713705), the National Natural Science Foundation of China (No. 52171109, 52201112 and 52371099), Xingliao Talent Program (Grant No. XLYC2203027), and Fundamental Research Funds for the Central Universities (No. N25LJ002).

语种：英文

外文关键词：Twinning-induced plasticity; Transformation-induced plasticity; Martensitic transformation; Twinning; Stacking fault energy; Austenitic steels

外文摘要：The stacking fault energy (SFE)-governed synergy between twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) mechanisms delivers superior mechanical properties compared to either effect alone. However, precise knowledge of an optimal TWIP and TRIP balance remains elusive and holistic understanding on the contributions from both TWIP and TRIP effects to the mechanical properties is still lacking. In this study, we show that by carefully tailoring the SFE to approximately 10 mJm-2 through adjustment of grain size and deformation temperatures, an optimal synergy between strength and ductility can be achieved in Fe-Cr-Ni austenitic steels with a variety of compositions. This synergy arises from the intricate manipulation of the sustained TWIP and TRIP effects. The optimal combination characterized by approximately 18% deformation twins and 50% strain-induced martensite is revealed by an SFE-dependent physical model which models the austenite -> twin -> alpha '-martensite transformation sequence. These findings offer valuable insights for the fast and cost-effective design of austenitic steels.