Defects, types and classification of the advance welding process-based industry: A review

Today industry needs to sophisticated welding methods that can overcome the rapid development in materials. The materials are taking nowadays new formation of alloys and composites that make engineering more complicated. However, pointing out some defects that associated welding is become more important to understand the behavior of materials to the sudden increase in temperature on the welding performance. The most characteristics that obtained from the literature is the mechanical properties and microstructure formation after welding. These characteristics describe how strong the welding is. This paper discussing some defects that generated from the advance welding technology that mainly used in the recent industry. First a discussion on the welding technology with description of each method, and then highlighting the defects and issues of each method in terms of welding type rather than specific material. So, the outcome of this review can be beneficial for researchers to impose more researches on enhancing and reducing as much as possible welding joints defects.