Xiaojie Wang

TL;DR: In this paper, a prediction model for the hot cracking rate was developed using a second order polynomial function considering only two factor interaction, and the model was then used to optimize welding parameters to achieve cracking-free welds.

TL;DR: In this article, the effect of welding speed on solidification cracking susceptibility in fiber laser welding of 6013 aluminum alloy was investigated by considering both mechanical and metallurgical factors, including cooling rate, solid fraction, local strain rate and microstructure characteristic resulted from different welding speeds.

TL;DR: In this article, an experimental study combined with a numerical model consideration of both thermal conduction and fluid flow in the molten pool were carried out, aiming to analyze solidification cracking susceptibility of dual-beam laser welding on Al alloys.

TL;DR: In this article, the authors investigated the effects of mechanical constraint intensity on solidification cracking behavior in single-side and double-side constraint conditions, respectively, and found that higher constraint intensity tends to promote crack propagation in single side constraint condition, and helps to suppress crack propagation on double side condition.

TL;DR: In this article, a three-dimensional thermomechanical finite element model of fiber laser welding of aluminium alloys was developed, which considered cylindrical volumetric heat source, temperature dependent material properties, solidification shrinkage and stress relaxation in the weld molten pool.