Residual Stress and Microstructures Characterization in Welded Al-Si-12Cu Alloy
X-ray diffraction method has been used to analyze the residual stress distribution across the joint of Al-Si-12Cu alloy just after welding process. On the other hand, isothermal heat treatments have been applied in order to study the residual stress evolution in this material. Optical microscope observation and Vickers hardness measurement have been carried out as complementary microstructure techniques. The different zones of welded joint have been analyzed, where the fusion zone was characterized by dendritic structure and different to heat affected zone. We have found a softening phenomenon in welded joint after heat according to microhardness results.
Z. Boumerzoug et al., "Residual Stress and Microstructures Characterization in Welded Al-Si-12Cu Alloy", Advanced Materials Research, Vol. 856, pp. 201-204, 2014