Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir welds

Loreleï Commin (1) , Myriam Dumont (2) , René Rotinat (3) , Fabrice Pierron (4) , Jean-Eric Masse (3) , Laurent Barrallier (3)

1 KIT - Karlsruhe Institute of Technology
2 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
3 MSMP - Mechanics surfaces and materials processing
4 University of Southampton

Friction stir welding induces a microstructural evolution and residual stresses that will influence the resulting mechanical properties. Friction stir welds produced from magnesium alloy hot rolled plates were studied. Electron back scattered diffraction was used to determine the texture evolution, residual stresses were analyzed using X ray diffraction and tensile tests coupled with speckle interferometry were performed. The residual stresses induced during friction stir welding present a major influence on the final mechanical properties.

Mots clés: Friction stir welding; Magnesium alloys; Speckle interferometry; Residual stress; EBSD

Domaines: Matériaux

Loreleï Commin, Myriam Dumont, René Rotinat, Fabrice Pierron, Jean-Eric Masse, et al.. Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir welds. Materials Science and Engineering: A, 2012, 551, pp.288-292. ⟨10.1016/j.msea.2012.05.021⟩. ⟨hal-01059258⟩