Superior tensile properties of 1%C-CoCrFeMnNi high-entropy alloy additively manufactured by selective laser melting. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Park, Jeong Min; Choe, Jungho; Kim, Jung Gi; Bae, Jae Wung; Moon, Jongun; Yang, Sangsun; Kim, Kyung Tae; Yu, Ji-Hun; Kim, Hyoung Seop
• Is Part Of: Materials research letters. Volume 8:Issue 1(2020)
• Page Start: 1
• Page End: 7
• Publication Date: 2020-01-02
• Subjects: High-entropy alloy -- additive manufacturing -- microstructure -- mechanical property -- multiple strengthening; Materials science -- Research -- Periodicals; Biomedical materials -- Research -- Periodicals; Composite materials -- Research -- Periodicals; Biomedical materials -- Research; Composite materials -- Research; Materials science -- Research; Periodicals; 620.1105
• DOI: 10.1080/21663831.2019.1638844
• Languages: English
• ISSNs: 2166-3831

Abstract

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. GRAPHICAL ABSTRACT: 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.