Most high-temperature components are subject to out-of-phase thermomechanical fatigue (OP-TMF), which induces crack growth at low temperatures. However, OP-TMF has been little studied in the context of short cracks. This study focuses on the experimental sensitivity of OP-TMF loading conditions playing on temperature range, gradient, and dwell time for thin sheet superalloy specimens. The material of interest is a Co-based superalloy, HA188. It is widely used in combustion chambers.

中文翻译：

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短疲劳裂纹扩展对热机械疲劳载荷敏感


大多数高温部件都会受到异相热机械疲劳 （OP-TMF） 的影响，这会导致在低温下产生裂纹。然而，OP-TMF 在短裂纹的背景下很少被研究。本研究的重点是 OP-TMF 加载条件对薄片高温合金试样的温度范围、梯度和停留时间的实验敏感性。感兴趣的材料是钴基高温合金 HA188。它广泛用于燃烧室。