About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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High Entropy Alloys VIII
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Presentation Title |
J-117: Overcoming Strength-ductility Trade-off in Additively Manufactured 1%C-CoCrFeMnNi High-entropy Alloy Induced by Hierarchically Heterogeneous Microstructure |
Author(s) |
Jeong Min Park, Jung Gi Kim, Jungho Choe, Jae Wung Bae, Jongun Moon, Ji-Hun Yu, Hyoung Seop Kim |
On-Site Speaker (Planned) |
Jeong Min Park |
Abstract Scope |
In this study, 1%C-CoCrFeMnNi high-entropy alloys (C-HEAs) were additively manufactured using selective laser melting (SLM). The alloys exhibited significant improvement of tensile properties after the SLM process as compared with not only as-cast conditions but also other SLM-processed HEAs previously reported. The superior tensile properties of the as-built C-HEAs could be attributed to their hierarchically heterogeneous microstructure with combination of various strengthening mechanisms. 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. In addition, the samples built at different scanning speeds exhibited different levels of strength, as explored by comparing each strengthening contribution. This work will open a new window to utilize SLM process for enhanced mechanical properties of HEAs with great potential. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |