Services · Residual stress measurement
Residual Stress Measurement by XRD
Review the process parameters, application scope, required input data and feasibility for a specific component.
What are residual stresses?
Residual stresses remain in a material after manufacturing or treatment and may be tensile or compressive. After Controlled Shot Peening, an XRD measurement can support evaluation of the effect at selected component locations. The test configuration depends on material, geometry, measurement points and directions.
The XRD method uses X-ray diffraction to determine stresses in the near-surface layer. Feasibility and test scope are confirmed for the specific component by the laboratory performing the measurement.
XRD measurements can be arranged as a stand-alone test or as part of a Shot Peening project, including comparison before and after the process. Testing is performed by a specialized external laboratory, while SP Center coordinates the scope, component preparation and delivery of results to the customer.
Almen intensity control describes Shot Peening process parameters and repeatability; it is not a direct measurement of stress in the material. XRD measures residual stress at a selected component location. Report scope and format are agreed before testing.
Information required to plan an XRD measurement
Measurement objective and expected output
Material and heat-treatment condition
Drawing with measurement points
Measurement directions
Surface measurement or depth profile
Before-and-after comparison
Report requirements