About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
Role of Formation and Dissolution of Brittle Sigma Phase on Mechanical Behavior of Ni46Al12Co18Cr8Fe12Mo4 High Entropy Alloy Synthesized via Mechanical Alloying and Spark Plasma Sintering |
Author(s) |
Sudhansu Maharana, D.K.V.D. Prasad, S.A. Seetharaman, Tapas Laha |
On-Site Speaker (Planned) |
Sudhansu Maharana |
Abstract Scope |
The aim of this work is to study the phase evolution on mechanical properties of Ni46Al12Co18Cr8Fe12Mo4, at. % high entropy alloy synthesized by mechanical alloying and spark plasma sintering. The mechanically alloyed powder was consolidated via SPS at 950 °C for 10 min (SPS-1), at 1000 °C for 10 min (SPS-2), at 1100 °C for 10 min (SPS-3) and 1200 °C for 10 min (SPS-4). Phase analysis of the sintered HEAs envisaged formation of face centred cubic (FCC) structured solid solution with minor amount of brittle sigma phases. Phase diagram generated from thermo-Calc shows that volume fraction of the sigma phases deceases continuously with temperature and further they dissolve at 1180 °C, which is in close agreement with differential thermal analysis (DTA) results. Moreover, microhardness of the consolidated HEAs decreased gradually with increase in sintering temperature, ascribed to lower volume fraction of the hard sigma phases at higher temperature. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Powder Materials, Mechanical Properties |