Recent progress in third-generation low alloy steels developed under M3 microstructure control
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第1期
论文作者：Zhen-jia Xie Cheng-jia Shang Xue-lin Wang Xue-min Wang Gang Han Raja-devesh-kumar Misra
文章页码：1 - 9
摘 要：During the past thirty years, two generations of low alloy steels（ferrite/pearlite followed by bainite/martensite） have been developed and widely used in structural applications. The third-generation of low alloy steels is expected to achieve high strength and improved ductility and toughness, while satisfying the new demands for weight reduction, greenness, and safety. This paper reviews recent progress in the development of third-generation low alloy steels with an M3 microstructure, namely, microstructures with multi-phase, meta-stable austenite, and multi-scale precipitates. The review summarizes the alloy designs and processing routes of microstructure control, and the mechanical properties of the alloys.The stabilization of retained austenite in low alloy steels is especially emphasized. Multi-scale nano-precipitates, including carbides of microalloying elements and Cu-rich precipitates obtained in third-generation low alloy steels, are then introduced. The structure–property relationships of third-generation alloys are also discussed. Finally, the promises and challenges to future applications are explored.
Zhen-jia Xie1，Cheng-jia Shang1，Xue-lin Wang1，Xue-min Wang1，Gang Han2，Raja-devesh-kumar Misra3
1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing2. Institute of Advanced Materials and Technology, University of Science and Technology Beijing3. Laboratory for Excellence in Advanced Steel Research, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso
摘 要：During the past thirty years, two generations of low alloy steels（ferrite/pearlite followed by bainite/martensite） have been developed and widely used in structural applications. The third-generation of low alloy steels is expected to achieve high strength and improved ductility and toughness, while satisfying the new demands for weight reduction, greenness, and safety. This paper reviews recent progress in the development of third-generation low alloy steels with an M3 microstructure, namely, microstructures with multi-phase, meta-stable austenite, and multi-scale precipitates. The review summarizes the alloy designs and processing routes of microstructure control, and the mechanical properties of the alloys.The stabilization of retained austenite in low alloy steels is especially emphasized. Multi-scale nano-precipitates, including carbides of microalloying elements and Cu-rich precipitates obtained in third-generation low alloy steels, are then introduced. The structure–property relationships of third-generation alloys are also discussed. Finally, the promises and challenges to future applications are explored.
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