|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Microstructure and Mechanical Behavior of Equiatomic CoCuFeMnNi High-entropy Alloy
||Anna Fraczkiewicz, Michal Mroz
|On-Site Speaker (Planned)
A novel equiatomic CoCuFeMnNi high-entropy alloy was investigated from the structural and mechanical point of view. According to a ThermoCalc calculation, the chosen composition should lead to a stable, FCC single-phase structure in a large range of temperatures. The alloy was cold crucible cast (350g ingot) and investigated in annealed conditions. In compression tests below 600 °C, the studied material shows a promising YS value of about 400 MPa and a significant plastic deformation (>20%) without cracking. Above 600 °C, a disastrous brittleness is observed in deformation conditions. Microstructural characterisation makes obvious the presence at this temperature of a eutectic transformation, leading to an intergranular liquefaction. TEM analysis let us identify the eutectic phases like a FCC rich in Ni, Cu and Mn, and a BCC phase enriched mainly in Fe and Co.
||Planned: A print-only volume