고엔트로피 합금강의 시효경화 및 재결정 연화현상
Age hardening and re-crystallization softening of a type of high entropy alloy, CoCrFeMnNi, was performed to investigate the relationship between microstructure and the property of mechanical hardness. Equiatomic CoCrFeMnNi was produced by casting followed by homogenizing, cold rolling and post heat...
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| Published in | 대한금속·재료학회지, 55(10) Vol. 55; no. 10; pp. 684 - 689 |
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| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | Korean |
| Published |
대한금속재료학회
05.10.2017
대한금속·재료학회 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1738-8228 2288-8241 |
| DOI | 10.3365/KJMM.2017.55.10.684 |
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| Abstract | Age hardening and re-crystallization softening of a type of high entropy alloy, CoCrFeMnNi, was performed to investigate the relationship between microstructure and the property of mechanical hardness. Equiatomic CoCrFeMnNi was produced by casting followed by homogenizing, cold rolling and post heat treatments. TEM analysis revealed that the microstructure of the as-rolled alloy was composed of elongated grains with twin laths and a shear band with fine grains, which exhibited a hardness of 371 HV. Following a 500 ℃ heat treatment the microstructure was composed of nano-twins and nano-grains, which represented age hardening, with 454 HV hardness. The microstructure of 700 ℃ heat treated samples was composed of re-crystallized grains and annealing twins, which represented annealed softening, with 244 HV hardness. The 700 ℃ heat treatment also produced spherical particles of 0.1 m maximum grain size, identified as Cr 23 C 6 type carbide.
†(Received March 13, 2017; Accepted May 22, 2017) |
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| AbstractList | Age hardening and re-crystallization softening of a type of high entropy alloy, CoCrFeMnNi, was performed to investigate the relationship between microstructure and the property of mechanical hardness. Equiatomic CoCrFeMnNi was produced by casting followed by homogenizing, cold rolling and post heat treatments. TEM analysis revealed that the microstructure of the as-rolled alloy was composed of elongated grains with twin laths and a shear band with fine grains, which exhibited a hardness of 371 HV. Following a 500 ℃ heat treatment the microstructure was composed of nano-twins and nano-grains, which represented age hardening, with 454 HV hardness. The microstructure of 700 ℃ heat treated samples was composed of re-crystallized grains and annealing twins, which represented annealed softening, with 244 HV hardness. The 700 ℃ heat treatment also produced spherical particles of 0.1 m maximum grain size, identified as Cr 23 C 6 type carbide.
†(Received March 13, 2017; Accepted May 22, 2017) Age hardening and re-crystallization softening of a type of high entropy alloy, CoCrFeMnNi, was performed to investigate the relationship between microstructure and the property of mechanical hardness. Equiatomic CoCrFeMnNi was produced by casting followed by homogenizing, cold rolling and post heat treatments. TEM analysis revealed that the microstructure of the as-rolled alloy was composed of elongated grains with twin laths and a shear band with fine grains, which exhibited a hardness of 371 HV. Following a 500 ℃ heat treatment the microstructure was composed of nano-twins and nano-grains, which represented age hardening, with 454 HV hardness. The microstructure of 700 ℃ heat treated samples was composed of re-crystallized grains and annealing twins, which represented annealed softening, with 244 HV hardness. The 700 ℃ heat treatment also produced spherical particles of 0.1 m maximum grain size, identified as Cr23C6 type carbide. KCI Citation Count: 4 |
| Author | 김형섭 장현수 Hyeon Su Jang Byung Hak Choe Hyoung Seop Kim Jong Un Moon 문종언 최병학 |
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| SubjectTerms | age hardening annealed softening Cr 23 C 6 carbide high entropy alloy nano-grain nano-twin TEM microstructure 재료공학 |
| Title | 고엔트로피 합금강의 시효경화 및 재결정 연화현상 |
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