Qinyuan Zheng, Yi Lu, Chengwu Zheng, Peng Liu, Tian Liang, Yikun Luan, Dianzhong Li
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引用次数: 0
Abstract
In the present study, a simple but effective two-step annealing processing strategy via manipulating the austenite reversion path is proposed to obtain a large fraction of retained austenite in low-Mn medium-Mn steels. Initially, the Fe–3Mn–0.2C–1.5Si (wt%) steel is intercritically annealed to form Mn-enriched lamellar martensite precursors. Subsequently, the austenite reversion transformation is manipulated to occur within the martensite lamellae during the second annealing process, resulting in an ultra-fine duplex microstructure of laminated austenite and ferrite. This process can not only allow a large fraction of austenite to be retained in low-Mn medium-Mn steels, but also increase the elongation by up to 41% without sacrificing the strength level compared to the conventional annealing.
期刊介绍：
This international journal presents compact reports of significant, original and timely research reflecting progress in metallurgy, materials science and engineering, including materials physics, physical metallurgy, and process metallurgy.
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