Residual stress measurement
What are residual stresses?
Residual stress (also called rest, rezydual, or self-stress) is the stress that remains in a material after processing. It can be harmful, as it may reduce the material’s tolerance to external forces. Often, this is a load that the structure must withstand. However, in the context of rolling bearings, residual stresses can be beneficial if they are compressive and located on the surface in a way that helps compensate for contact loads.
Measurement of residual stresses is used, among others, in welded structures, machine components (gears, turbine blades, camshafts), rolling mill rolls, surface layers, and after heat treatment.
Residual stress measurement is performed using an X-ray diffractometer to assess residual stresses and the content of retained austenite.
Tests are conducted on both small laboratory samples and industrial structures. It is also possible to measure residual stresses on-site at the client’s facility.
The measurement provides a specific value expressed in MPa/mm², distinguishing between compressive stresses (negative values) and tensile stresses (positive values).
We offer X-ray testing in the following areas:
Measurement of retained austenite content
Determination of residual stresses (Type I) in selected directions
Determination of residual stresses as a depth profile (0–250 µm)
Determination of the residual stress tensor
Determination of Type II residual stresses and crystallite size
Phase composition analysis – phase identification
Investigation of crystal aggregate size in plastics
If you are interested in our services, we encourage you to get in touch
+ 48 781 820 143
biuro@spcenter.pl