Effect of weld geometry and residual stresses on fatigue in butt-welded joints

Study of Mechanical Properties of AZ91 Magnesium Alloy Welded by Laser Process Taking into Account the Anisotropy Microhardness and Residual Stresses by X-Ray Diffraction

“…We can see two explanations of these evolutions. On the one hand, the effect of temperature and cooling speed gradients arise from the anisotropic heat flow [35], on the other, the anisotropy can be the result of a shrinking structure [36,37]. The negligible thermal dilation of both plates prevents the free shrinkage of the weld line along the direction of the weld line.…”

“…The restricted shrinkage in the transverse plane arises from the clamping of the plates during welding. Even if the influence of the clamping is hard to evaluate experimentally, digital studies have shown that the field of residual stresses is strongly influenced by the geometry of the assembly [37,38].…”

Welding of Thin Light Alloys Sheets by CO2 Laser Beam: Magnesium Alloys

“…We can see two explanations of these evolutions. On the one hand, the effect of temperature and cooling speed gradients arise from the anisotropic heat flow (Teng et al, 2002), on the other, the anisotropy can be the result of a shrinking structure. The negligible thermal dilation of both plates prevents the free shrinkage of the weld line along the direction of the weld line.…”

Effect of vibratory welding process on hardness of dissimilar welded joints

“…River marking, the characteristic of cleavage fracture, is observed in the heat-affected zone (HAZ) specimens. Teng et al (2002) showed that the stress concentrations usually occur at structural geometry discontinuities, e.g. weld toes, and crack like defects.…”