Impact fatigue is a condition that occurs when a component undergoes repeated collisions resulting in cracks and eventual damage. Impact fatigue is often accompanied by an unusually high ultimate tensile strength and ductile–brittle transition temperature.
Impact fatigue occurs when a progressive strain-rate is achieved; this rate is set at about 103 s−1. This rate is higher than the corresponding strain-rate of conventional fatigue, given the same stress level and material.
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