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The effect of titanium and silicon addition on phase equilibrium and mechanical properties of CoCrFeMnNi-based high entropy alloy

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Title: The effect of titanium and silicon addition on phase equilibrium and mechanical properties of CoCrFeMnNi-based high entropy alloy
Authors: Yamanaka, Syuki Browse this author
Ikeda, Ken-ichi Browse this author →KAKEN DB
Miura, Seiji Browse this author →KAKEN DB
Issue Date: May-2021
Publisher: Springer
Journal Title: Journal of Materials Research
Volume: 36
Issue: 10
Start Page: 2056
End Page: 2070
Publisher DOI: 10.1557/s43578-021-00251-0
Abstract: The effects of Ti and Si addition on the phase equilibrium and mechanical properties of the equiatomic CoCrFeMnNi high entropy alloy (Cantor alloy) were investigated. The phase equilibrium at 1000 degrees C was determined from the result of X-ray diffraction and electron probe micro-analysis. Ti addition stabilizes the sigma phase, A12 phase and C14-Laves phase, while Si addition stabilizes the A13 phase. The phase relationships were represented by projection onto (Co, Fe, Mn, Ni)-Cr-X(Ti or Si) isothermal ternary cross-section at 1000 degrees C in Co-Cr-Fe-Mn-Ni-X senary system. Tensile tests were conducted on Cantor-based fcc single solid solution alloys with Ti or Si dissolution at room temperature. The 0.2% yield strength and ultimate tensile strength increased with either element addition. The Ti-added alloy showed higher strength than the Si-added alloy. The difference in ductility in the alloys is related to their strain hardening behavior in the higher strain range.
Type: article
URI: http://hdl.handle.net/2115/82192
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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