Microstructural and environmental effects on fretting fatigue
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One of the primary causes of premature fatigue failures is a phenomenon known as fretting. The research leading to this paper consisted of developing information regarding microstructural and environmental effects on fretting fatique of a .40/.50 carbon steel. Microstructural effects are discussed in terms of stress/life data, crack growth data, and fractographic analysis of two microstructures. The effect of environment is analyzed through data from these two microstructures being tested in lab air and vacuum. The hypothesis developed is that the microstructure plays an important part in the initial stages of fretting damage and that the mechanical damage is responsible for the largest portion of the decrease in fatigue life.
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