文献类型：期刊文献

英文题名：Enabling strong and formable advanced high-strength steels through inherited homogeneous microstructure

作者：Xu, Ning[1];Wang, Lingyu[1];Hu, Jun[1,2];Wu, Yuxiang[3];Wei, Xiaolu[1];Xue, Weilin[1];Chai, Zhisong[1];Wang, Jinliang[4];Li, Yizhuang[1];Xu, Wei[1]

机构：[1]Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China;[2]Northeastern Univ, Foshan Grad Sch Innovat, Foshan 528312, Peoples R China;[3]Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia;[4]Guangdong Ocean Univ, Sch Mech Engn, Zhanjiang 524088, Peoples R China

年份：2025

卷号：259

外文期刊名：SCRIPTA MATERIALIA

收录：SCI-EXPANDED(收录号：WOS:001400846400001)、、EI(收录号：20250317688194)、Scopus(收录号：2-s2.0-85214800065)、WOS

基金：This work was supported by the National Key Research and Devel-opment Program (2022YFB3707501) , Natural Science Foundation of China (52201112, 52371099, 52101133, and 52311530082) , Guang-dong Basic and Applied Basic Research Foundation (2022B1515120029) , and Applied Basic Research Program of Liaoning Province (No. 2023JH2/101300147) .

语种：英文

外文关键词：Q&P steel; Microstructure inheritance; Homogeneous microstructures; Yield strength; Stretch-flangeability; Stretch-flangeability

外文摘要：Fabricating quenching and partitioning (Q&P) steels with less mechanical heterogeneity among phases is crucial for achieving balanced strength and formability. In the present study, we demonstrate a strategy for fine-tuning the microstructural inheritance effect to optimize the final microstructure. This approach involves a rapid cooling and tempering step after hot rolling to template an initial microstructure with uniformly distributed ferrite laths. The final microstructure contains a higher volume fraction of primary martensite and stable retained austenite, leading to enhancement in both strength and ductility. The templating method also eliminates bulky ferrite and significantly reduces strain localization, as demonstrated by microscopic digital image correlation (mu-DIC). The templated final microstructure not only achieves higher yield strength compared to existing Q&P980 steels, but also exhibits simultaneous improvement in elongation and stretch-flangeability. Our findings suggest that it is essential to consider and leverage the inheritance effect to optimize products with long processing chains.