Europe Technologies Group
Sonats

Residual stresses measurement and analyzes

Methods: X-ray diffraction, hole drilling and other destructive and non-destructive methods.

  • X-ray diffraction according to EN 15305 and ASTM E2860, non-destructive superficial or semi-destructive in-depth measurement, laboratory-based or portable system.
  • Incremental hole-drilling strain-gage method according to ASTM E837, semi-destructive measurement, laboratory-based or portable sytem.
  • Mechanical destructive methods based on stress relaxation: slitting, curvature and layer removal methods.
  • Access to large scale facilities for specific applications requiring non-destructive in-depth measurement (synchrotron X-ray, neutron).

 

Your needs: product quality and process optimization

SONATS provides a high quality package of services for residual stresses and materials analyzes.

 

Residual stresses cause detrimental distortion during component manufacturing. They also influence material cracking resistance and component lifetime: fatigue, stress corrosion, tenacity. Besides metallurgical and dimensional aspects, knowledge and control of residual stresses is decisive for product quality assurance and process optimization.

 

Laboratory's strengths:

  • 25 years of experience in international engineering services and residual stress measurement, more than 100,000 measured components,
  • Highly qualified and experienced engineers and researchers,
  • Effective support for results contextualization and valorization,

Typical applications:

SONATS methods are applicable to any type of component and material, regardless of the expected residual stresses distribution :

 

  • Compressive residual stresses after shot peening on steel, aluminum, titanium and Inconel (also for rolling, blasting, burnishing, carburizing, nitriding, thin layer or thermal spraying, etc.) Download our brochure for Shot Peened surface characterization:
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  • Residual stress and surface integrity after machining (cutting, grinding, polishing),
  • Correlation between distortion and residual stresses,
  • Residual stresses in additive layer manufacturing,
  • Residual stresses in welding and influence of post-weld treatment,
  • Effect of temperature in stress relieving treatment.

 

Cases studies: depth inspection of compressive residual stresses after shot peening, control of fatigue test specimen preparation, prediction of part distortion in machining, qualification of a new manufacturing process, distortions due to heat treatment, raw material receipt quality control, influence of the filler metal on a MIG-MAG welding process, residual stresses after friction stir welding, residual stresses after laser welding, residual stresses after needle penning and high-frequency mechanical impact (HFMI), effect of stress relieving treatment, residual stresses onto HVOF deposit, residual stress on silicon wafers. Effect of substrate quality on residual stress in deposit, etc.