About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys IV: Mechanical Behavior
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Presentation Title |
Development and Characterisation of αAlCuFeMnTi High Entropy Alloy for Structural Applications |
Author(s) |
Dhiman Kumar Mahata, Partha Sarathi De |
On-Site Speaker (Planned) |
Dhiman Kumar Mahata |
Abstract Scope |
This study focuses on designing and characterizing a non-equimolar αAlCuFeMnTi high entropy alloy (HEA) for structural applications. Prepared using high-purity materials via arc melting and casting in a copper mold, the alloy maintained a stable microstructure at elevated temperatures, consisting of ~67% body-centered cubic (BCC) and ~33% face-centered cubic (FCC) phases. It demonstrated high hardness (524 HV) and reasonable elasticity. The oxidation resistance was comparable to AISI 304 stainless steel, making it suitable for applications up to 750°C. The oxidized surface had an aluminum-rich oxide layer over a thin titanium-rich oxide layer. Potentiodynamic polarization tests showed similar aqueous corrosion resistance to AISI 304, with low-temperature surface oxidation enhancing resistance. However, a positive cyclic hysteresis loop indicated susceptibility to pitting corrosion. XRD and Raman Spectroscopy of the corroded surface confirmed the presence of aluminum oxide and other metallic oxides. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Characterization, High-Temperature Materials |