The macroscopic morphology and microstructure evolution mechanism of the FGH95 alloy were investigated with regard to fracture under low-cycle fatigue at different temperatures. The fracture modes of the FGH95 alloy at 420 °C, 510 °C, and 600 °C were found to fall into two main categories: shear fracture at low temperatures (420 °C, 510 °C) and I type fracture at high temperatures (600 °C). The change in fracture mode can be attributed to the increase in strength of the precipitated phase with temperature. At low temperatures, the dislocation structure moves mainly by cutting, bypassing the precipitated phase by climbing at high temperatures. The different movement of the dislocations leads to the different fracture types of FGH95 alloy at different temperatures.

中文翻译：

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温度对粉末冶金高温合金 FGH95 低周疲劳变形的影响


研究了 FGH95 合金在不同温度下低周疲劳下断裂的宏观形貌和微观组织演变机制。FGH95合金在420 °C、510 °C和600 °C时的断裂模式分为两大类：低温剪切断裂（420 °C、510 °C）和高温（600 °C）下的I型断裂。断裂模式的变化可归因于析出相的强度随温度的增加。在低温下，位错结构主要通过切割移动，在高温下通过攀升绕过沉淀相。位错的不同运动导致 FGH95 合金在不同温度下出现不同的断裂类型。