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| Enhancement of low-temperature toughness of Fe–Mn–C–Al alloy by rare earth Ce-modified inclusions |
| Guang-kai Yang1, Chang-ling Zhuang1,2, Yi-zhuang Li3, Chen Hu2, Shao-bo Li4, Shao-bo Li4 |
1 College of Materials and Metallurgy, Guizhou University, Guiyang 550025, Guizhou, China
2 Department of Mechanical Engineering, University of Hong Kong, Hong Kong 999077, China
3 The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
4 State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, Guizhou, China |
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Abstract Fe–Mn–C–Al alloys have been recognized as promising materials for certain low-temperature applications due to their exceptional mechanical properties and cost-effectiveness. However, their limited low-temperature toughness restricts their large-scale applications in specific scenarios. The influence of trace amounts of rare earth cerium (Ce) on the lowtemperature toughness of Fe–18Mn–0.6C–1.8Al alloys was investigated. The addition of Ce effectively alters the inclusions in the alloy, transforming large-sized irregular inclusions into fine ellipsoidal rare earth inclusions. This leads to a significant reduction in both the proportion and average size of the inclusions, resulting in their effective dispersion throughout the matrix and improved cryogenic performance. The presence of Ce-containing inclusions within the matrix reduces stress concentration, thereby inhibiting microcrack formation and improving impact absorption energy. Specifically, the addition of rare earth Ce alters the fracture behavior of the material at room temperature and low temperature, changing from brittle cleavage fracture to a more ductile failure mode. The impact toughness of the Fe–Mn–C–Al alloy is significantly improved by the addition of 0.0048 wt.% Ce, particularly at -196 °C where the impact toughness reaches 103.6 J/cm2, representing an impressive improvement of 87.3%.
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Received: 04 August 2023
Published: 25 January 2024
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| Cite this article: |
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Guang-kai Yang,Chang-ling Zhuang,Yi-zhuang Li, et al. Enhancement of low-temperature toughness of Fe–Mn–C–Al alloy by rare earth Ce-modified inclusions[J]. Journal of Iron and Steel Research International, 2024, 31(1): 157-173.
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2024, Vol. 31 
