Abstract Strain-controlled Low-Cycle Fatigue tests (LCF) and Thermo-Mechanical Fatigue tests (TMF) were performed on a low-alloy martensitic steel in the temperature range between 300°C and 600°C, with and without a strain dwell. TMF tests were performed for three different phase angles between thermal strain and mechanical strain: as in-phase, as out-of-phase and as counter clockwise-diamond. The results show that the phase angle that is employed has a significant influence on the dominant damage mechanism and on the observed lifetime. Finally, a modified damage model is proposed in order to take into account the effect of the phase angle.

中文翻译：

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等温低周疲劳蠕变和热机械疲劳蠕变载荷条件下低合金马氏体钢的寿命评估

摘要 在 300°C 到 600°C 的温度范围内对低合金马氏体钢进行了应变控制低周疲劳试验 (LCF) 和热机械疲劳试验 (TMF)，有和没有应变驻留。针对热应变和机械应变之间的三种不同相位角进行 TMF 测试：同相、异相和逆时针菱形。结果表明，所采用的相角对主要损伤机制和观察到的寿命有显着影响。最后，为了考虑相位角的影响，提出了一种修正的损伤模型。