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Open AccessArticle

Effect of Weld Bead Shape on the Fatigue Behavior of GMAW Lap Fillet Joint in GA 590 MPa Steel Sheets

1
Joining R & D Group, Korea Institute of Industrial Technology, 156 Gaetbeol-ro (Songdo-dong), Yeonsu-Gu, Incheon 21999, Korea
2
Department of Mechanical Engineering, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Korea
*
Author to whom correspondence should be addressed.
Metals 2017, 7(10), 399; https://doi.org/10.3390/met7100399
Received: 21 August 2017 / Revised: 23 September 2017 / Accepted: 24 September 2017 / Published: 28 September 2017
In this study, the effect of weld bead shape on the fatigue strength of lap fillet joints using the gas metal arc welding (GMAW) process was investigated. The base material used in the experiment was 590 MPa grade galvanealed steel sheet with 2.3 mm and 2.6 mm thickness. In order to make the four types of weld beads with different shapes by factors such as length, angle, and area, the welding process, wire feeding speed, and joint shape were changed. The stress-number of cycles to failure (S–N) curve and fatigue strength were obtained from the fatigue test for four types of weld bead, and the cause of the fatigue strength difference was clarified through the analysis of the geometrical factors, such as length, angle, and area of the weld bead. In addition, the relationship between weld bead shape and fatigue strength was discussed. View Full-Text
Keywords: lap fillet joint; S–N curve; fatigue strength; weld bead geometry; gas metal arc welding (GMAW) lap fillet joint; S–N curve; fatigue strength; weld bead geometry; gas metal arc welding (GMAW)
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Hwang, I.; Kim, D.-Y.; Jeong, G.; Kang, M.; Kim, D.; Kim, Y.-M. Effect of Weld Bead Shape on the Fatigue Behavior of GMAW Lap Fillet Joint in GA 590 MPa Steel Sheets. Metals 2017, 7, 399.

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