Comparative study on microstructure and mechanical properties of laser welded–brazed Mg/mild steel and Mg/stainless steel joints

Li, Liqun; Tan, Caiwang; Chen, Yanbin; Guo, Wei; Song, Fan

doi:10.1016/j.matdes.2012.06.057

Cited by 66 publications

(28 citation statements)

References 32 publications

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“…Nowadays, welding of dissimilar metal couples became more attractive, since metal couples have a potential to fulfill the requirements under same service conditions. Therefore studies concerning welding method and materials have been carried out [6,7]. Although the joining of steel to another metal by friction stir spot welding (FSSW) has been studied [2,3,8,9], a study of steel to brass welding could not be found in the literature survey.…”

Section: Introductionmentioning

confidence: 99%

Weldability of CuZn30 Brass/DP600 Steel Couple by Friction Stir Spot Welding

Barlas

2017

Acta Phys. Pol. A

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This study deals with the weldability and assessment of the friction stir spot welding of dissimilar CuZn30 brass/DP600 steel couple. The effects of axial tool load and tool hold time were evaluated in the joining experiments. The tool load forces of 3.2 − 4.8 kN and the tool hold times of 8 s and 12 s were applied to brass/steel bimetal sheets. Tensile-shear test was employed to investigate the mechanical properties of the joint. Optical and scanning electron microscopies were utilized to characterize the microstructure of the joint having the better mechanical performance, as well as the microhardness test. Temperature measurements were also performed between the lapped sheet faces. The results show that the vertical tool load value has reached more significant influence than the tool hold time. Furthermore, the tensile-shear failure load has increased with increasing tool load and hold time and has reached the highest value of 4.6 kN. The EDS analyses on the fractured surface depict that the copper and zinc concentrations are similar to those of CuZn30 base metal. A peak temperature of 607• C was measured in the weld centre of this joint. No significant microstructural change was observed in the steel sheet, while the fine grains with onion rings were revealed in the brass. Different hardness values were measured depending on microstructural change in the weld zone. Although the onion rings made a contribution to the microhardness, a softened stir zone (129.8 HV), with regard to the brass base metal (149.1 HV), was observed.

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Section: Introductionmentioning

confidence: 99%

Weldability of CuZn30 Brass/DP600 Steel Couple by Friction Stir Spot Welding

Barlas

2017

Acta Phys. Pol. A

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“…Fusion welding processes have been used in order to overcome the disadvantage of solid-state welding between magnesium alloys and steel; these processes include a laser hybrid [9][10][11][12][13][14][15][16][17][18][19][20][21] , laser braze [22][23][24][25][26][27][28] , and resistance spot welding [29][30][31] on the dissimilar joint. Liu [9][10][11][12][13][14][15] and Qi [16][17][18][19] have applied a laser-arc hybrid process to various dissimilar joints of magnesium alloy and steel.…”

Section: Introductionmentioning

confidence: 99%

“…Laser braze welding also was applied to the joint of magnesium alloy and steel [22][23][24][25][26][27][28] . Wahba and Katayama 22) characterized the lap joint formed between an AZ31B magnesium alloy and a zinc-coated steel.…”

Section: Introductionmentioning

confidence: 99%

“…Wahba and Katayama 22) characterized the lap joint formed between an AZ31B magnesium alloy and a zinc-coated steel. Li et al and Tan et al [23][24][25][26][27][28] examined the microstructure and evaluated the mechanical properties of laser welded-brazed joints formed between magnesium and Zn-coated/non-Zn-coated steel. These studies revealed that, in the case of the galvanized steel, the crack propagated along the interface between the Mg-Zn reaction layer and the pre-existing Fe-Al layer, owing to weak bonding between these layers.…”

Section: Introductionmentioning

confidence: 99%

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Joining of AZ31 Magnesium Alloy and Steel Sheet under Four Different Coating Conditions Based on Gas Metal Arc Weld-Brazing

Kang

Kim

2017

Mater. Trans.

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Dissimilar joining of AZ31 Mg alloy to various steel sheets with different coatings (galvanized (GI), galva-annealed (GA), cold rolled bare (CR), and aluminized (Aluminized) steel sheets) was performed by gas metal arc brazing. An excellent weld bead appearance was obtained in all cases and the wettability of the AZ31-GI steel joint was better than that of the other brazed joints. Moreover, the AZ31-CR steel brazed joint exhibited the highest tensile-shear strength. The fracture behaviors of the four brazed joints were different and depended mainly on the chemical composition (especially the Zn content) of the coating layer. Owing to the weak bonding between the Mg-Zn eutectic phase and the Fe-Al intermetallic compound, which formed at the interface of the joint, the strength of the Zn-coated steel (GI and GA steel sheet) joints was lower than that of their non-Zn-coated counterparts.

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“…Laser welding-brazing is widely used for joining titanium to aluminum and many investigations have been performed for improving the interfacial reaction layer [9][10][11]. Microstructure and mechanical properties of laser welded-brazed Mg/mild steel and Mg/stainless steel joints using an Mg based filler metal and zinc coated steel (DP600) with aluminum alloy (AA6016) using a Zn based filler metal have been studied by researchers [12,13]. In another article [14] fatigue properties of laser-brazed joints of dual phase and transformation induced plasticity steel with a copper-aluminum filler metal have been investigated.…”

Section: Introductionmentioning

confidence: 99%