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X-Ray Determination of Residual Stresses and Hardness in Steel Due to Thermal, Mechanical, and Fatigue Deformations
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English
Abstract
Residual stress and hardness in steel due to thermal, mechanical, and fatigue deformations are determined by an X-ray diffraction method. The sharp temperature rise associated with electrical discharge machining causes austenitizing, rehardening, and tempering, and results in high tensile residual stress. Shot-peening quality is evaluated from residual stress and hardness induced by the peening. Rolling contact fatigue of carburized and hardened bearings causes a transformation of austenite to martensite, and thereby generates more residual compression, and also causes permanent fatigue softening. Less softening is observed in inner races of consutrode and cross-forged steels than in air-melted steel, and the former steels exhibit greater fatigue life at early and mean failure levels.
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Citation
Roberts, J., "X-Ray Determination of Residual Stresses and Hardness in Steel Due to Thermal, Mechanical, and Fatigue Deformations," SAE Technical Paper 620053, 1962, https://doi.org/10.4271/620053.Also In
References
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