文献类型：期刊文献

英文题名：Transitions in the thermal stability of pre-strained austenite - competing effects between defect density and slip band spacing

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

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

年份：2023

卷号：223

外文期刊名：SCRIPTA MATERIALIA

收录：SCI-EXPANDED(收录号：WOS:000877686400002)、、EI(收录号：20224212901984)、Scopus(收录号：2-s2.0-85139614349)、WOS

基金：Acknowledgment JLW and JH would like to acknowledge the support of National Natural Science Foundation of China (Grant No. 52101133 and No. 52071066) . LYW would like to acknowledge the support of the Funda-mental Research Funds for the Central Universities (N2107005) and the China Postdoctoral Science Foundation (2022M710627) .

语种：英文

外文关键词：Metastable austenite; Mechanical stabilization; Mechanical destabilization; Martensitic transformation; Thermal stability

外文摘要：The transition from mechanical destabilization to stabilization in metastable austenite is an important issue affecting the design of structures used at lower temperatures. We have conducted in-situ magnetic measurement and detailed microscopy work to reveal the underlying mechanisms of such transition. Austenite destabilization is attributed to the increase of slip band and dislocation densities which provide extra nucleation sites. The decreased slip band spacing divides the austenite grains into small units, hindering the growth of martensite. It also inhibits the formation of multiple martensite variants and retards nucleation. The competition between defect density and spacing is the key to the transition.