Effect of Weld Geometry and HAZ Softening on Fatigue Performance of DP780 GMAW Lap Joint

Koganti, Ramakrishna; Angotti, Sergio; Joaquin, Armando; Jiang, Canhua

doi:10.4271/2007-01-0632

Cited by 15 publications

(2 citation statements)

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“…Lee et al [7] quantified the fatigue strength of arc-welded joints for 440, 590 and 1470 MPa grade steel sheets to investigate the fatigue behavior and proposed a method to improve the fatigue life of welded parts. Koganti et al [8] reported the fatigue behavior of the arc weld of dual-phase (DP) 780 MPa grade steel. Chung et al [9] studied the fatigue behavior of DP 780 MPa grade steel for various weld shapes using lap fillet joint arc welding.…”

Section: Introductionmentioning

confidence: 99%

Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets

Kim

Hwang

Jeong

et al. 2018

Metals

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Weld defects such as blowholes and surface pores occur due to zinc vaporization during the gas metal arc welding of lap fillet joints of Zn-coated steel. In this study, the effect of porosity on fatigue behavior was investigated. A Zn-coated steel sheet with the strength of 590 MPa and a thickness of 2.3 mm was used as the base material. Three kinds of specimens with weld pore defects, such as blowholes and surface pores, were prepared and the tensile shear strength, hardness and fatigue behavior were investigated. The pore defects in the welds reduced the tensile shear strength. In the fatigue test, at higher load stresses between 122 and 366 MPa, pore defects reduced the fatigue life of the weld. However, the pore defects in the welds did not significantly affect the fatigue life of the welds at stresses below 92 MPa.

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Section: Introductionmentioning

confidence: 99%

Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets

Kim

Hwang

Jeong

et al. 2018

Metals

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“…It is reported that the shape of the PAW weld is wider and gentler than that of the GMAW weld, improving the fatigue characteristics. Kognti et al [6] presented different welds by varying the welding conditions at the lap fillet joint and compared the fatigue strength of the welds and it was confirmed that the fatigue strength was increased by increasing the weld toe angle. Chung et al [7] showed welds with different weld toe angles and fatigue strength according to the change of torch and push angle.…”

Section: Introductionmentioning

confidence: 96%

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

Hwang

Kim

Jeong

et al. 2017

Metals

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Abstract: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.

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Improvement of fatigue strength of lap fillet joints by using tandem MAG welding in a 590-MPa-grade galvannealed steel sheet

Kim

Kang

et al. 2017

Int J Adv Manuf Technol

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Effect of Weld Geometry and HAZ Softening on Fatigue Performance of DP780 GMAW Lap Joint

Cited by 15 publications

References 0 publications

Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets

Effect of Porosity on the Fatigue Behavior of Gas Metal Arc Welding Lap Fillet Joint in GA 590 MPa Steel Sheets

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

Improvement of fatigue strength of lap fillet joints by using tandem MAG welding in a 590-MPa-grade galvannealed steel sheet

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