About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development IV: Rapid Development
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Presentation Title |
Additive Manufacturing Based Combinatorial Approach for Assessing the Magnetic Properties of High Entropy Alloys |
Author(s) |
Sriswaroop Dasari, M.S.K.K.Y. Nartu, Varun Chaudhary, Tushar Borkar, Bharat Gwalani, Raju Ramanujan, Rajarshi Banerjee |
On-Site Speaker (Planned) |
Rajarshi Banerjee |
Abstract Scope |
A combinatorial assessment of composition-microstructure-magnetic property relationships in the magnetic high entropy AlCoxCr1-xFeNi alloy (0≤x≤1) system has been carried out using compositionally graded alloys fabricated via laser additive manufacturing. At one end the AlCoFeNi composition consisted of equiaxed B2 grains, exhibiting very early stages of phase separation into Ni-Al rich and Fe-Co rich regions. At the other extreme, the AlCrFeNi composition exhibited pronounced spinodal decomposition, resulting in a B2+bcc microstructure with the degree of spinodal decomposition progressively increasing with Cr content. While the saturation magnetization monotonically increases six times from x=0 to x=1, the coercivity variation is non-monotonic, increasing seven times from x=0 to x=0.4, and subsequently decreasing fourteen times from x=0.4 to x=1.0. The magnetic phase transition temperature for these alloys also increases monotonically with increasing Co content. Such substantial changes in the magnetization behavior opens possibilities of tuning these alloys for specific soft or hard magnetic component applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, Phase Transformations |