Abstract
Problem statement: Currently, in order to suppress intermetallic reaction layer formation during dissimilar metals welding between steel/aluminum alloy, only laser beam welding as self-brazing technique has been applied. However, TIG welding process might be one of welding process candidate for joining dissimilar metals welding between steel/aluminum alloys due to its capability in joining thin section. In the present study, the feasibility of application of TIG welding process in joining dissimilar metals between steel/aluminum alloy was evaluated. Approach: In order to realize the feasibility of TIG welding process, bead on the steel sheet experiment and dissimilar metals welding experiment was carried out. Results: From bead on the steel sheet experimental results, TIG welding could produce the partial penetration welding in 1 mm thickness steel sheet. In dissimilar metals welding experiment, TIG welding process as a self-brazing technique could successfully join dissimilar metal between steel and aluminum alloy. Moreover, the load resistance of bonded zone of dissimilar metals joints was higher than the load resistance of A1100 aluminum alloy after welding. Conclusion: These results indicated that TIG welding process is feasible to be dissimilar metals welding candidate for joining steel/aluminum alloy.
Highlights
It has been known that the difficulty of dissimilar metals joining between steel and aluminum alloy is caused with the brittle intermetallic reaction phase formation
Dissimilar metals between steel/aluminum alloy as Figure 2 shows the macroscropic observation of discussion in bead on the steel sheet section, it is not steel weld pool obtained with electrical current of 45 A confirmed that the dissimilar metals joint has well and 0.65 m min−1 of welding speed
In dissimilar metals welding between was found that the partial penetration of molten zone of steel/aluminum alloy section, TIG welding together steel sheet could be obtained by TIG welding process
Summary
It has been known that the difficulty of dissimilar metals joining between steel and aluminum alloy is caused with the brittle intermetallic reaction phase formation. In order to suppress the formation of intermetallic reaction phase, self-brazing technique, which the molten zone of steel was controlled to be a partial penetration during lap-joint welding between steel/aluminum alloy as shown, was used in many researches (Borrisutthekul et al, 2007; Miyashita et al, 2005; Lee et al, 2005; Lee and Kumai, 2006; Rathod and Kutsuna, 2004). TIG welding is suitable welding process for joining thin section It is one of the possible welding processing for joining dissimilar metal between st/eel/aluminum alloys by using self-brazing technique due to its possibility to produce partial penetration weld in steel sheet. Few researches were done in order to investigate the feasibility of using TIG welding process in joining steel and aluminum alloy by using self brazing process. The feasibility study of using TIG welding in welding of dissimilar metals between steel and aluminum alloy was carried out
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