The fatigue failure process of metal is a complex energy exchange process accompanied by temperature evolution due to energy dissipation and heat transfer, which can be well recorded by infrared thermography. With the development and popularization of infrared thermography, many energy dissipation estimation methods have been proposed. In this work, three types of energy dissipation estimation methods in different time periods during the high-cycle fatigue experiment are derived and improved. The energy dissipations of FV520B stainless steel specimens (which are subjected to different heat treatments) during fatigue cyclic loading are estimated with the different derived methods and compared. The assumptions for thermal loss may be the main reason for error in the different methods. The energy dissipations estimated by the different methods have basically the same overall trend. Finally, some suggestions on high-cycle fatigue experimental procedures for energy dissipation estimation are proposed.

中文翻译：

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金属材料高周疲劳载荷期间能量耗散估计的实验程序

金属的疲劳破坏过程是一个复杂的能量交换过程，伴随着能量耗散和传热导致的温度演化，红外热像仪可以很好地记录下来。随着红外热成像技术的发展和普及，人们提出了许多能量耗散估计方法。在这项工作中，推导出并改进了高周疲劳实验中不同时间段的三种能量耗散估计方法。FV520B不锈钢试样（经过不同热处理）在疲劳循环加载过程中的能量耗散用不同的推导方法估计并进行了比较。热损失的假设可能是不同方法中出现错误的主要原因。不同方法估算的能量耗散总体趋势基本一致。最后，对能量耗散估计的高周疲劳实验程序提出了一些建议。