The temperature effect on the mechanical behavior of the HfNbTaTiZr high entropy alloy (HEA) was investigated at 77–673 K. The decrease of the yield strength with increasing the temperature was mechanistically analyzed by considering contributions from various strengthening mechanisms. An anomalous dependence of strain hardening on temperature was observed and was justified to be caused by dynamic strain aging (DSA) as an extra strengthening mechanism at elevated temperatures. A model was constructed to split the overall strain hardening into forest hardening and DSA hardening, both of which were theoretically quantified at all temperatures considered.

中文翻译：

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体心立方高熵合金的动态应变时效强化引起的Peierls势垒特性和异常应变硬化

研究了温度对HfNbTaTiZr高熵合金（HEA）的力学行为的影响，其温度范围为77-673K。通过考虑各种强化机制的作用，机械分析了屈服强度随温度升高的降低。观察到应变硬化对温度的异常依赖性，并被证明是由动态应变老化（DSA）作为高温下的额外强化机制引起的。构建了一个模型，将整体应变硬化分为森林硬化和DSA硬化，这两种理论上都在考虑的所有温度下进行了量化。