A Review on Aluminum Arc Welding and It's Problems

摘要

The latest trends in the automotive world have shifted from conventional materials to lightweight materials such as aluminium. Aluminum was chosen because it is lighter than steel, this is because the specific gravity of aluminum is smaller than the weight of steel which is 2.70 g/cm~3 and iron 7.86 g/cm~3. The same volume and sufficient strength make aluminum used in the land and air transportation industry The big challenge for this industry is to make vehicles that are fuel efficient and environmentally friendly, one way to save fuel is to reduce the weight of the material. Aluminum welding is the most important thing in the joining process. Aluminum weldability has many disadvantages, because aluminum is very reactive. Common defects in aluminum welding are porosity, cracked shrinkage and large heat affected zone (HAZ). Something that affects weldability in aluminum is high thermal conductivity, high shrinkage in solidification, formation of oxides on the surface, high solubility of hydrogen under melting conditions. Some of these problems become problems in conventional processes (GTAW and GMAW) to new processes such as laser beam welding and cold metal transfer. Until now the defects in the aluminum welding process have been studied by researchers, to facilitate the understanding of readers in aluminum problems and their resolution, this review is needed.