3 GPa dual-phase stainless steel from synergistic heterogeneous structure and nano-precipitate

作者：Qiang Li, Lichu Zhou, Hong Gao, Yijie Pan, Jinfeng Ma, Xiaodan Zhang, Jianqing Jiang, Feng Fang · 发表于：Materials Research Letters · 年份：2024 · DOI：10.1080/21663831.2024.2438879 · 被引用次数：19 · 研究领域：Microstructure and Mechanical Properties of Steels、Hydrogen embrittlement and corrosion behaviors in metals、Welding Techniques and Residual Stresses

Grain refinement is the most common strategy to improve the mechanical performance of metals such as strength, wear resistance and fatigue. For the 2101 duplex stainless steel (DSS), a heterogeneous microstructure composed of sub-25 nm fiber grains and submicron elongated grains was successfully prepared by heavily drawing taking advantage of the heterogeneous microstructural design. The DSS possesses ultra-high strength of 3 GPa which is 15% higher than the reported that of DSS or a leading strength-ductility combination of 1.43 GPa and 17%. This study provides a strategy for heterogeneous microstructural design to achieve excellent mechanical performance, specifically high strength.