METALS AND METAL MATRIX COMPOSITES |
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Effect of Heat Treatment on Microstructure and Properties of Iron-based Medium-entropy Alloys ZHAO Yanchun1,, LI Shu1, LI Chunling2, ZHAO Pengbiao1, LI Wensheng1, KOU Shengzhong1, YAN Fengyun1 |
medium-entropy alloys, heat treatment, structure, mechanical property
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1 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China 2 College of Mechano-Electronic Engineering, Lanzhou University of Technology, Lanzhou 730050, China |
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Abstract Fe77.3-xMnxSi9.1Cr9.8C3.8 medium-entropy alloys were prepared by water-cooled copper crucible magnetic levitation melting-copper mold ne-gative pressure suction casting method, and the effect of quenching at 1 100 ℃ for different time on microstructure and mechanical properties of the alloys was studied. The results show that the Fe77.3-xMnxSi9.1Cr9.8C3.8 medium-entropy alloys are all low stacking fault energy alloys, the structure of the Fe63.3Mn14Si9.1Cr9.8C3.8 alloy is a single FCC structure before and after heat treatment, the structure of the as-cast Fe54.3Mn23-Si9.1Cr9.8C3.8 alloy is FCC and HCP dual-phase structure, and the HCP structure is transformed into FCC structure during quenching at 1 100 ℃. The comprehensive mechanical properties of the Fe77.3-xMnxSi9.1Cr9.8C3.8 medium-entropy alloys are the best when the holding time is 20 min. The fracture strength and plasticity of the Fe63.3Mn14Si9.1Cr9.8C3.8 alloy after heat treatment are respectively 3 250 MPa and 24.5%, and the river pattern is dense in the fracture morphology, and the dimples in the central region of the fracture surface are dense and uniform.
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Published: 13 January 2022
Online: 2022-01-13
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Fund:This work was financially supported by the National Natural Science Foundation of China (52061027,51661017), the Outstanding Youth Fund Project of Gansu Province (17JR5RA108) and Lanzhou University of Technology Hongliu Outstanding Youth Fund Project (2018). |
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Cite this article: |
medium-entropy alloys,heat treatment,structure, et al. Effect of Heat Treatment on Microstructure and Properties of Iron-based Medium-entropy Alloys ZHAO Yanchun1,, LI Shu1, LI Chunling2, ZHAO Pengbiao1, LI Wensheng1, KOU Shengzhong1, YAN Fengyun1[J]. Materials Reports,
2022, 36(1): 20090161-5.
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URL: |
http://www.mater-rep.com/EN/10.11896/cldb.20090161 OR http://www.mater-rep.com/EN/Y2022/V36/I1/20090161 |
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