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Apparatus for studying fretting fatique in vacuum

机译：用于研究真空中微动疲劳的设备

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Recent investigations on the mechanism of fretting fatigue have indicated that mechanical damage, not chemical corrosion, has the largest effect in decreasing structural component life. Since there is no general agreement on the mechanism of fretting fatigue, an experiment has been designed to evaluate statistically the relative role of the mechanical process and the chemical process in reducing fatigue life. An initial step was to develop an apparatus that allows fretting fatigue tests to be performed in both laboratory air and vacuum environments. A detailed discussion of the experimental apparatus and experimental procedure are presented in this paper. Also typical test results are presented. It is found that fretting fatigue in vacuum is about ten times slower than that in laboratory air. Fractographic analysis of the wear surface indicated that less severe fretting damage occurred in the vacuum environment.
机译：对微动疲劳机理的最新研究表明，机械损伤而非化学腐蚀对减少结构部件的寿命影响最大。由于关于微动疲劳的机理尚未达成共识，因此设计了一个实验，以统计学方式评估机械过程和化学过程在减少疲劳寿命方面的相对作用。最初的步骤是开发一种设备，该设备允许在实验室空气和真空环境中进行微动疲劳测试。本文对实验装置和实验程序进行了详细讨论。还介绍了典型的测试结果。发现真空中的微动疲劳比实验室空气中的微动疲劳慢约十倍。磨损表面的分形分析表明，在真空环境中发生的磨损严重程度较轻。

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