Cold metal transfer spot plug welding of AA6061-T6-to-galvanized steel for automotive applications

Consideración sobre la soldadura de transferencia de metal frio de AA5754 al acero galvanizado a partir de aspectos mecánicos y microestructurales

“…According to Al-Fe binary phase diagram, Fe 2 Al 5 compound contains 53-57 wt.% aluminum (Kattner and Burton, 1992). Formation of brittle Fe 2 Al 5 intermetallic phase was approved by EDX analysis of 5G-2 which can also be supported by the findings of (Maitra and Gupta, 2002;Agudo et al, 2007;Cao et al, 2014b) (Table 6).…”

“…CMT welding of AA6061 to galvanized steel was studied by numerous researchers (Agudo et al, 2007;Cao et al, 2013;Yang et al, 2013;Zhang et al, 2013;Cao et al, 2014b). However, there is limited number of studies about CMT welding of AA5754 to steel in literature.…”

Joining Al 5052 alloy to aluminized steel sheet using cold metal transfer process

“…Recently, with the rapid progress in the low-heat-input arc welding process, cold metal transfer (CMT), waveform controlled cold arc, AC pulse arc, and pulsed double electrode arc welding processes have been developed for thin sheet welding, and their application to Al/Fe dissimilar metal joining has been studied. In most cases, galvanized steel was considered as the steel base material [18][19][20][21][22][23][24][25]26] because the Zn-coating layer prevents oxidation of the steel plate before welding. Otherwise, the oxide layer disturbs the wetting of the filler metal on the steel sheet.…”

Influence of Filler Alloy Composition and Process Parameters on the Intermetallic Layer Thickness in Single-Sided Cold Metal Transfer Welding of Aluminum-Steel Blanks

“…[12] The CMT process enables spatter-free joining of similar metals, e.g., Al-Al bead-on-plate [13][14][15] or butt welding, [16] as well as joining of dissimilar metals, e.g., Al-steel butt welding with tapered steel sheet edges, [17][18][19] overlap welding, [20][21][22][23][24][25][26][27][28][29] or even spot welding. [30][31][32] In comparison with conventional gas metal arc (GMA) welding processes, the heat input of the CMT process is significantly reduced. Since both the aluminum-based sheet and the filler melt whereas the steel sheet remains solid, joining is achieved by the combination of aluminum welding and steel brazing.…”