Parameter optimization and quality analysis of pulsed laser joining of 316L stainless steel and polylactic acid. (April 2023)

• Record Type: Journal Article
• Authors: Wu, Jiakai; Gao, Xiangdong; Huang, Yijie; Ye, Guangwen; Zhang, Yanxi; Gao, Perry P.
• Is Part Of: Optics & laser technology. Volume 159(2023)
• Publication Date: 2023-04
• Subjects: Dissimilar materials -- Polylactic acid (PLA) -- Laser-assisted metal-plastic direct joining (LAMP) -- Orthogonal experiment -- Joint quality and morphology -- Joint failure mode; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2022.108965
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: Laser joining of 316L stainless steel and polylactic acid was studied by orthogonal experiment. Significant factors affecting the joint quality and morphology were discovered. Shear force of joint reached 88.73% of the polylactic acid base material. The relationship between five joint morphologies and four failure modes was established. Abstract: To realize the joining of dissimilar material 316L stainless steel with polylactic acid (PLA), the laser-assisted metal-plastic direct joining (LAMP) method was applied, and the process parameters were optimized based on the method of orthogonal experiment, and the quality of the joint was studied. The influence law of each influencing factor of the joining process on the joint quality and joint morphology was obtained through orthogonal experiments, to find out the maximum influencing factor and obtain the optimal process combination. By a universal tensile testing machine to find out the influence of the process parameters on the joint failure modes. The results showed that the laser power, pulse duty ratio, and laser speed had a major influence on the shear force, elongation at break and joint width. The maximum shear force achieved by the optimized method was 1694.379 N, reaching 88.73 % of the tensile force of the PLA base material, and the elongation at break was 5.47 %, reaching 76.91 % of the base material, obtained a more satisfactory joint effect. The correspondence between five joint morphologies and four failure modes is established, and different process parameters can be selected according to different applications of 316L stainless steel-PLA composite materials, to optimize industrial manufacturing.