Studying the influence of varying root opening of joint design on the weld strength / Akramin Mohd Zuhudi

A study was performed to accumulate data on the effects of increasing root opening of weld joint design on the mechanical properties of the welded parts. Experiments were conducted using Gas Metal Arc Welding with 100% CO2 as shielding gas. Low current is used so that less amount of metal is used and less heat affecting the weld joint. The welding was applied on mild steel plates thickness of 8.9 mm and various root openings of single V-groove butt joint. The welded specimens were tested to obtain their strength by using tensile test. The ductility of the weld was also studied using guided bend test. The results and characteristics of all specimens were studied and analyzed using these two destructive testing procedures. In order to complete this project, literature review has been done to get the understanding and to get familiar with a new joint design based on feedback from weld strength. All the information is taken from the internet, books and journal. Literature review process is a continuous process until the thesis is completed. The equipment needed such as tensile test machine and bend test machine is studied before the project development is started. During the project development, the plates to be welded were prepared in compliance with the standards as well as other requirements. After the preparation, all these plates were welded by the welder asjnstructed in the Welding Procedure Specification (WPS). Then, the welded plates were prepared for testing. The testing entailed non-destructive testing and destructive testing. Finally, the results of all the conducted tests were compiled and analyzed.