Infrared Thermography is an advanced Non Destructive Evaluation technique based on the detection of infrared radiation. It is best suited for online weld monitoring to produce defect free welds. The most important step involved in online weld monitoring is to develop an automated algorithm for weld defect detection and quantification. Incomplete Penetration occurs when penetration of the weld m...

Hybrid laser arc welding is a relatively new process, whereby combining the advantages of two different processes, beam and gas metal welding, represents an excellent substitute for conventional but has not yet been sufficiently elaborated researched. Additional research should be carried out in terms hybrid technologies, this leads to creation development standards procedures that would confir...

Femtosecond (fs) laser irradiation has been shown to be effective for welding transparent materials and for transparent materials to metals. However, to date there is little work regarding similar applications in welding/bonding of metals. In this article, we for the first time to the best of our knowledge report on fs laser-induced microwelding of Ag microwires and Cu substrates. The influence...

Minor problems arising from optimizations by welding of fixed prostheses frameworks can be identified by macroscopic and microscopic visual inspection. The purpose of this study was to highlight the visible discontinuities present in the laser welds of dental Ni-Cr alloys. Ni-Cr base metal alloys designated for fixed prostheses manufacture were selected for the experiments. Using cast plates, p...

In the present work CO2 continuous laser welding process was successfully applied and optimized for joining a dissimilar AISI 316 stainless steel and AISI 1009 low carbon steel plates. Laser power, welding speed, and defocusing distance combinations were carefully selected with the objective of producing welded joint with complete penetration, minimum fusion zone size and acceptable welding pro...