Thermal fatigue stability in microstructure and strength of Fe35Ni35Cr20Mn10 high-entropy alloy (HEA) wire and pearlite wire at 400–700 °C with low cycles was studied. The pearlite wire has a poor stability in microstructure and strength, significantly changing with the temperature. HEA wire has an excellent thermal fatigue stability. After the thermal fatigue at 400 °C and 500 °C, the microstructure and strength does not change at all. Only after the thermal fatigue at 600°C and 700 °C, the microstructure and strength change considerably. Both the values of UTS and YS of the HEA wires after the thermal fatigue at 500 °C and 600 °C are higher than that of the pearlite wires, even both the values of HEA wire in as-drawn state are much lower than that of pearlite wire. Both the thermal fatigue and isothermal annealing at 500 °C and 600 °C resulted in an obvious tempering brittleness in pearlite wire.

中文翻译：

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Fe35Ni35Cr20Mn10高熵合金丝和珠光体丝在高/中温环境下的组织和力学性能热疲劳稳定性研究

研究了 Fe35Ni35Cr20Mn10 高熵合金 (HEA) 丝和珠光体丝在 400–700 °C 低循环下的显微组织和强度的热疲劳稳定性。珠光体丝的显微组织和强度稳定性较差，随温度变化明显。 HEA 焊丝具有优异的热疲劳稳定性。 400℃和500℃热疲劳后，显微组织和强度完全没有变化。只有在600℃和700℃热疲劳后，显微组织和强度才会发生较大变化。 HEA线材在500℃和600℃热疲劳后的UTS和YS值均高于珠光体线材，但拉拔态HEA线材的UTS和YS值均远低于珠光体线材。珠光体丝。 500℃和600℃的热疲劳和等温退火均导致珠光体线材出现明显的回火脆性。