Abstract Crack closure effects are known to have a large impact on crack growth behaviour. In this work, tests were performed on Inconel 792 specimens under TMF loading conditions at 100–850 °C with extended hold times at tensile stress. The effective stress-intensity range was estimated experimentally using a compliance-based method leading to the conclusion that crack closure appears to have a primary impact on the crack growth behaviour for this material under the conditions studied. The crack closure behaviour for the tests was successfully modelled using numerical simulations, including creep.

中文翻译：

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考虑延长燃气轮机叶片合金保持时间的 TMF 裂纹扩展试验中的裂纹闭合效应

摘要 裂纹闭合效应对裂纹扩展行为有很大影响。在这项工作中，在 100–850 °C 的 TMF 加载条件下对 Inconel 792 试样进行了测试，并延长了在拉伸应力下的保持时间。使用基于柔度的方法通过实验估计有效应力强度范围，得出的结论是裂纹闭合似乎对该材料在研究条件下的裂纹扩展行为有主要影响。使用数值模拟（包括蠕变）成功地模拟了测试的裂纹闭合行为。