Microstructure and properties of CrMnFeCoNi high-entropy alloy prepared by mechanical alloying and spark plasma sintering |
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Authors: | Xuyao Ni Tao Lu Jiayi Pan Miao Li Jianwen Dai |
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Affiliation: | School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing, People’s Republic of China |
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Abstract: | The equiatomic ratio CrMnFeCoNi high entropy alloy (HEA) was prepared by mechanical alloying (MA) and spark plasma sintering. This paper reports the behaviour of MA, the phase formation, microstructure and mechanical properties of CrMnFeCoNi HEA. With the increase of milling time, solid solution with single FCC phase was gradually formed. The single FCC phase remained as matrix after SPS at 1373?K and 50?MPa. Ultrafine-grained microstructure and good mechanical properties were obtained: At room temperature, the as-sintered bulks exhibit an excellent combination of high compressive strength (2390?MPa) and high fracture strain (47%). |
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Keywords: | High entropy alloy mechanical alloying spark plasma sintering FCC phase ultra-fine grain nanoscale twins |
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