Structural automotive components are subjected to fatigue damage under cyclic stresses and strains. The fatigue damage initiates at stress levels lower than the elastic limit of the material and results in cracks. The Initial fatigue cracks are difficult to detect, such cracks can develop rapidly and cause sudden and brittle failure in structures. Many structural automotive components are fabricated involving weld induced local conditions such as geometry of weld toe and localized tensile residual stresses. These conditions are favorable for initiation of fatigue damage at weld toe.In current work, sever plastic deformation (SPD) which is based on high frequency impact treatment using ultrasound energy was applied on weld toe of representative weld joints. The effect of SPD on weld toe geometry modification, microstructure and residual stresses were evaluated. Microscopic and X-ray diffraction techniques were used to study the effects of SPD. It was observed that SPD can significantly refine the weld toe geometry and induce compressive residual stresses, which can potentially improve fatigue life of weld joint.
Severe Plastic Deformation Treatment for Geometry and Residual Stress Modification of Weld Toe
Sae Technical Papers
International Conference on Automotive Materials and Manufacturing AMM 2023 ; 2023
25.05.2023
Aufsatz (Konferenz)
Englisch
Residual Stress Measurement of Titanium Weld Certification Rings
British Library Conference Proceedings | 1996
|Simulation analysis of plastic deformation and residual stress distribution of radial ring rolling
British Library Online Contents | 2008
|Severe plastic deformation of the magnesium alloy AZ31
Tema Archiv | 2007
|Producing Nanostructured Materials by Severe Plastic Deformation for Advanced Applications
British Library Conference Proceedings | 2006
|