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Although refractory high-entropy alloys have exceptional strength at high temperatures, they are often brittle at room temperature. One exception is the HfNbTaTiZr alloy, which has a plasticity of over 50% at room temperature. However, the strength of HfNbTaTiZr at high temperature is insufficient. In this study, the composition of HfNbTaTiZr is modified with an aim to improve its strength at high...
A high-entropy alloy system, AlCoCrFeMo 0.5 Ni x , was designed based on the AlCoCrCuFeNi alloy, by replacing Cu with Mo in order to improve strength and thermal stability. Ni content was monitored to see its effect on microstructure and properties. The microstructure of AlCoCrFeMo 0.5 Ni x alloys consists of B2, FCC, and σ phase which are all multi-element solid solutions...
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