CW/PW dual-beam YAG laser welding of steel/aluminum alloy sheets

Laser fusion–brazing of aluminum alloy to galvanized steel with pure Al filler powder

“…Therefore, no cracks were found near the interfacial reactive layer in the joints (Figs. 3 and 5), which was different from other researches on Al/Fe welding [5][6][7][8]28]. …”

“…Therefore, it is necessary to study the joining technique that can ensure high reliability. To obtain a high-quality joint between aluminum and steel, several welding processes such as laser beam fusion welding [5][6][7], dual-beam laser welding [8], and laser beam welding with pressure [9][10] have been investigated so far. However, fusion base metal could bring a large number of intermetallic compounds in the laser beam fusion welding and dual-beam laser welding process.…”

Employment of fiber laser technology to weld austenitic stainless steel 304 l with aluminum alloy 5083 using pre-placed activating flux

“…In particular, the process of joining the aluminum alloys with various types of steels has undergone widespread research due to its outstanding applicability in various structural components [7,8]. However, direct joining of aluminum alloys to steels accompanies various challenges due to tremendous differences in their thermo-physical properties such as coefficient of thermal expansion, specific heat and heat conductivity which can lead to formation of various defects [9][10][11]. In addition, iron and aluminum are metallurgically incompatible owing to their low solid solution miscibility, which can result in formation of various Fe x Al y brittle intermetallic compounds [9][10][11].…”

“…However, direct joining of aluminum alloys to steels accompanies various challenges due to tremendous differences in their thermo-physical properties such as coefficient of thermal expansion, specific heat and heat conductivity which can lead to formation of various defects [9][10][11]. In addition, iron and aluminum are metallurgically incompatible owing to their low solid solution miscibility, which can result in formation of various Fe x Al y brittle intermetallic compounds [9][10][11]. Various joining methods including mechanical [2,5,12], solid state [2,4,5] and fusion joining [7,11,13], have been implemented to join aluminum alloys to steels.…”

Dissimilar Metal Joining of Zinc Coated Steel and Aluminum Alloy by Laser Roll Welding

“…Since laser welding has advantages such as local heat input, short process time and high flexibility compared with other welding processes, there has been considerable research on the welding of steel and aluminum. In the recent, the studies of keyhole welding (Torkamany, et al, 2010), laser welding-brazing (Dharmendra, et al, 2011), dual-beam YAG laser welding (Yan, et al, 2010), and thermal cycle during laser welding (Fan, et al, 2011) are carried out.…”