1971-02-01

Residual Stress in the Induction Hardened Surface of Steel, 1971 710280

The residual stresses produced by static and progressive induction hardening processes were investigated using different diameter bars and different heating conditions. The x-ray diffraction method of stress measurement was used. Compressive stresses were observed at and slightly below the surface in the hardened zone, while lower compressive stresses or tensile stresses were seen at the ends of this zone. These stresses depended on the shapes and sizes of the heated zone and the cooling patterns. Shot peening was seen to convert the tensile stress to a compressive value.

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