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Kim, Duck Young
Smart Factory Lab (SF)
Research Interests
  • Smart factory, Smart control, Failure analysis, Simulation

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Correlation analysis of the variation of weld seam and tensile strength in laser welding of galvanized steel

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Title
Correlation analysis of the variation of weld seam and tensile strength in laser welding of galvanized steel
Author
Sinha, Amit KumarKim, Duck YoungCeglarek, Darek
Keywords
Destructive techniques; Laser welding technology; Non-destructive technique; Nondestructive testing method; Part-to-part gap; Tensile shear strength; Ultrasonic inspections; Weld seam
Issue Date
201310
Publisher
ELSEVIER SCI LTD
Citation
OPTICS AND LASERS IN ENGINEERING, v.51, no.10, pp.1143 - 1152
Abstract
Many advantages of laser welding technology such as high speed and non-contact welding make the use of the technology more attractive in the automotive industry. Many studies have been conducted to search the optimal welding condition experimentally that ensure the joining quality of laser welding that relies both on welding system configuration and welding parameter specification. Both non-destructive and destructive techniques, for example, ultrasonic inspection and tensile test are widely used in practice for estimating the joining quality. Non-destructive techniques are attractive as a rapid quality testing method despite relatively low accuracy. In this paper, we examine the relationship between the variation of weld seam and tensile shear strength in the laser welding of galvanized steel in a lap joint configuration in order to investigate the potential of the variation of weld seam as a joining quality estimator. From the experimental analysis, we identify a trend in between maximum tensile shear strength and the variation of weld seam that clearly supports the fact that laser welded parts having larger variation in the weld seam usually have lower tensile strength. The discovered relationship leads us to conclude that the variation of weld seam can be used as an indirect non-destructive testing method for estimating the tensile strength of the welded parts.
URI
http://scholarworks.unist.ac.kr/handle/201301/3459
DOI
http://dx.doi.org/10.1016/j.optlaseng.2013.04.012
ISSN
0143-8166
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