About this Abstract |
Meeting |
2nd World Congress on High Entropy Alloys (HEA 2021)
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Symposium
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2nd World Congress on High Entropy Alloys (HEA 2021)
|
Presentation Title |
ON DEMAND: The Effect of Titanium and Silicon on the Phase Equilibrium in the Co-Cr-Fe-Mn-Ni System |
Author(s) |
Syuki Yamanaka, Satoshi Takizawa, Ken-ichi Ikeda, Seiji Miura |
On-Site Speaker (Planned) |
Syuki Yamanaka |
Abstract Scope |
The equiatomic CoCrFeMnNi high-entropy alloy (Cantor alloy), which is an fcc single solid solution alloy, is expected as a next-generation structural material because of its excellent ductility. For further improvement of its mechanical properties, it is a natural way to introduce second phases to the Cantor-based fcc matrix by extra-element addition. For the design of multi-phase alloys, phase diagrams are required which clearly express the relationship between the Cantor-based fcc phase and the second phase stabilized by extra-element addition. The phase equilibrium on Ti or Si-added Cantor alloys which was produced by arc melting and homogenized at 1000°C were investigated. From the result of XRD and EPMA, it was found that Ti addition stabilized the σ, A12(αMn), and C14-Laves phases, while Si addition stabilized the A13 phase (βMn). Based on fragmental information in its sub-system phase diagram, it is suggested that both A12 and A13 phases are derived from pure-Mn. |
Proceedings Inclusion? |
Undecided |