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.
X-Ray Determination of Residual Stresses and Hardness in Steel Due to Thermal, Mechanical, and Fatigue Deformations
Sae Technical Papers
Pre-1964 SAE Technical Papers ; 1906
1962-01-01
Aufsatz (Konferenz)
Englisch
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