Microstructure evolution and fracture behavior of laser welded-brazed titanium/aluminum joints with various gap sizes

Chen, Zilin; Cai, Chuang; Yu, Jie; Huang, Jiasen; Chen, Hui; Li, Liqun

doi:10.1016/j.jmrt.2024.01.133

Cited by 2 publications

(1 citation statement)

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“…The laser was focused on the base metals and vertically irradiated on the workpiece. Before the welding process, the base metals were cleaned by a chemical agent and polished to remove surficial oxidation, in order to obtain a satisfactory welding formation [26]. To protect the oxidation of the weld seam, Argon protective gas was flowed behind the molten pool to obtain a satisfactory welding formation.…”

Section: Selected Materials and Experimental Equipmentmentioning

confidence: 99%

Effect of Welding Gap of Thin Plate Butt Welds on Inherent Strain and Welding Deformation of a Large Complex Box Structure

Zhang,

Peng,

Yang

et al. 2024

Materials

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In this study, an effective numerical model was developed for the calculation of the deformation of laser-welded 3 mm 304L stainless steel plates with different gaps (0.2 mm, 0.5 mm, and 1.0 mm). The welding deformation would become larger when the welding gaps increased, and the largest deformation values along the Z direction, of 4 mm, were produced when the gap value was 1.0 mm. A larger plastic strain region was generated in the location near the weld seam, since higher plastic deformation had occurred. In addition, the tensile stress model was also applied at the plastic strain zone and demonstrated that a larger welding gap led to a wider residual stress area. Based on the above results, inherent deformations for butt and corner joints were calculated according to inherent strain theory, and the welding formation for the complex structure was calculated with different gaps. The numerical results demonstrated that a larger deformation was also produced with a larger welding gap and that it could reach the highest value of 10.1 mm. This proves that a smaller welding gap should be adopted during the laser welding of complex structures to avoid excessive welding deformation.

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Section: Selected Materials and Experimental Equipmentmentioning

confidence: 99%