Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry
In this paper, the residual deformation induced in laser welding processing was studied by using the moiré interferometry and a novel high-temperature specimen grating technology. The experimental results indicate that the heat-affected zone of laser welding is a narrow strip. There exists great residual strain gradient in the heat-affected zone, especially great residual shear strain gradient. It implies that great residual stress and stress gradient exist near the welded seam. The relationship between the size of the heat-affected zone and the changes of the technology parameters were discussed in the experiments, which can supply some reliable experimental data for optimizing processing technology.
Soon-Bok Lee and Yun-Jae Kim
Z. W. Liu, D. Q. Zou, W. Z. Chen, W. N. Wang, Y. Fang, "Residual Deformation Measurement of Laser Weldment Using the Laser Interferometry", Key Engineering Materials, Vols. 326-328, pp. 63-66, 2006