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Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting

Title
Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting
Authors
Park, J.M.Choe, J.Kim, J.G.Bae, J.W.Moon, J.Yang, S.Kim, K.T.Yu, J.-H.Kim, H.S.
Date Issued
2020-01
Publisher
TAYLOR & FRANCIS INC
Abstract
CoCrFeMnNi high-entropy alloys containing 1 at% carbon (C-HEAs) were additively manufactured using selective laser melting (SLM). Superior tensile properties of the as-built C-HEA (to previously reported ones) were achieved by utilizing multiple strengthening mechanisms (i.e. solid solution, grain refinement, dislocation density, and nano-precipitation) by this new manufacturing method. In particular, the SLM process could allow to maximize the strengthening effect of carbon addition to HEAs via finely distributed nano-carbides at the boundaries of solidification cellular structure. This work will open a new window to utilize the SLM process for enhanced mechanical properties of HEAs with great potential. [GRAPHICS] IMPACT STATEMENT CoCrFeMnNi high-entropy alloys containing 1 at% carbon were successfully produced by selective laser melting, and the alloys exhibited much better tensile performance than additive manufactured high-entropy alloy previously reported.
URI
https://oasis.postech.ac.kr/handle/2014.oak/100102
ISSN
2166-3831
Article Type
Article
Citation
MATERIALS RESEARCH LETTERS, vol. 8, no. 1, page. 1 - 7, 2020-01
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김형섭KIM, HYOUNG SEOP
Dept of Materials Science & Enginrg
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