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Development of Light-Weight TRIP/TWIP FCC High Entropy Alloy with High Specific Strength and Large Ductility
고비강도와 고연신을 가지는 다중변형기구 하이엔트로피 합금 개발
Kook Noh Yoon, Hyun Seok Oh, Je In Lee, Eun Soo Park
윤국노, 오현석, 이제인, 박은수
Korean J. Met. Mater. 2021;59(12):857-869.   Published online 2021 Nov 19
DOI: https://doi.org/10.3365/KJMM.2021.59.12.857

In this study we developed a novel (TRIP+TWIP) high entropy alloy (HEA) with high specific strength and large ductility. First, by controlling the atomic constitution of the 3d transition metals (Cr, Mn, Fe, Co, and Ni), we designed a light-weight TRIP-assisted dual-phase HEA with a non-equiatomic composition of Cr22Mn6Fe40Co26Ni6, which..... More

Effect of Carbon Addition and Recrystallization on the Microstructure and Mechanical Properties of CoCrFeMnNi High Entropy Alloys
CoCrFeMnNi 고엔트로피 합금에서 탄소 첨가 및 재결정열처리가 미세구조 및 기계적 특성에 미치는 영향
Jun Yeong Ko, Jae Sook Song, Sun Ig Hong
고준영, 송재숙, 홍순익
Korean J. Met. Mater. 2018;56(1):26-33.   Published online 2018 Jan 1
DOI: https://doi.org/10.3365/KJMM.2018.56.1.26

The effect of carbon addition on the cast and rolled microstructures of CoCrFeMnNi high entropy alloys were studied. Both as-cast CoCrFeMnNi and CoCrFeMnNiC0.1 alloys have a dendritic microstructure. Small carbide particles were observed at the inter-dendritic region in the as-cast CoCrFeMnNiC0.1 and elongated-grained structure with aligned carbides were developed at..... More

         Cited By 4
Microstructure and Mechanical Properties of As-cast CoCrFeMnNi High Entropy Alloy
CoCrFeMnNi 고엔트로피합금 주조재의 미세조직 및 기계적 특성
Minju Kang, Jong Woo Won, Ka Ram Lim, Sang Hyeop Park, Seong Moon Seo, Young Sang Na
강민주, 원종우, 임가람, 박상협, 서성문, 나영상
Korean J. Met. Mater. 2017;55(10):732-738.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.732

In this study, we made large-scale ingots of CoCrFeMnNi high entropy alloy by vacuum induction melting. The as-cast CoCrFeMnNi high entropy alloy contained a high proportion of columnar structures with a few equiaxed grains, and showed single phase fcc solid solutions without macro segregation and low interstitial levels. The tensile..... More

         Cited By 2
Age Hardening and Re-crystallization Softening of a CoCrFeMnNi High Entropy Alloy
고엔트로피 합금강의 시효경화 및 재결정 연화현상
Byung Hak Choe, Hyeon Su Jang, Hyoung Seop Kim, Jong Un Moon
최병학, 장현수, 김형섭, 문종언
Korean J. Met. Mater. 2017;55(10):684-688.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.684

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..... More

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