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- W4387566173 abstract "The influence of heat treatment cycles on the phase transformation and mechanical properties of a non-equiatomic cast CrMnFeNiCu high-entropy alloy (HEA) was investigated. In its initial as-cast state, the alloy exhibited a hierarchical structure comprising dual-FCC+BCC phases. Through heat treatment at 900-950°C, a significant amount of σ-phase formed at the expense of the Cr-Fe-rich BCC phase, resulting in a dual-FCC+BCC+σ microstructure. However, at 1000°C, the σ-phase underwent extensive reversion, leading to the dissolution of the hierarchical structure. The as-cast HEA, with its hierarchically structured microstructure, exhibited superior mechanical properties and lower strain-rate sensitivity than the solid solution CrMnFeCoNi (Cantor alloy) due to the strengthening by the microscale phase separation as athermal obstacles instead of the nanoscale thermal obstacles such as short-range heterogeneities in CrMnFeCoNi alloy. The thermally activated transformation of the σ-phase influenced the mechanical characteristics of the annealed HEA samples." @default.
- W4387566173 created "2023-10-13" @default.
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- W4387566173 date "2023-10-01" @default.
- W4387566173 modified "2023-10-13" @default.
- W4387566173 title "Exploring the impact of heat treatment on the transformation of hierarchical microstructure and mechanical properties in a non-equiatomic CrMnFeNiCu high-entropy alloy with a reversible structure" @default.
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- W4387566173 doi "https://doi.org/10.1016/j.jallcom.2023.172514" @default.
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