Toyo Seiko Web Site:Inspecting Compressive Residual Stress

Residual stress is important factor for fatigue strength of material, stress corrosion cracking and also Fretting fatigue. Toyo Seiko is available not only for the measurement of the residual stress but also submitting the best solution for the fatigue strength as a professional company of Shot Peening. In General, residual stress evaluation could work well for the solution against the deformation, crack which comes from heat treatment. Further the harmful tensile residual stress by heat treatment and machining could also be measured by X-ray diffractometer. Toyo Seiko would measure residual stress and retained austenite by X-ray diffractometer with the plenty of acknowledgement.

XRD (X-ray diffraction)
- Compressive residual stress inspection
- Retained austenite inspection
- Qualitative analysis
Other inspection
- Hardness inspection
- Surface roughness inspection

Any requests, whether for trial or commercial, are accepted
Ability to inspect compressive residual stress, hardness, surface roughness in acceptance with our quality assurance standards
Ability to inspect retained austenite

In the case of using shot with a hardness of HV800 or more, the maximum compressive residual stress value turns out to be approx 2 times larger compared with Shot of HV520 hardness.