• BESUFKAD FEYISA ALEMU

This study tried to investigate the process parameters optimization of Friction Stir Welding on 5 mm similar double sided butt welded pure copper plate to enhance tensile strength. To overcome the problem of fusion welding of copper in joint brittleness, oxidation, solidification and large distortion and to optimize the process parameters it needs adequate information of the tool dwell time, tool rotational speed, and traverse speed without this it was difficult to use the special properties of copper with its excellent resistance to corrosion, high electrical and thermal conductivities ,and the favorable strength and ductility for many industrial applications. The study applied scientific methods, specifically statistical methods of both Taguchi and Gray relational & coupled with Principal component analysis and selected universal milling machine as welding machine. Throughout the study, multiple quality features like ultimate tensile strength and percentage of elongation are focused. The process parameters, namely Tool rotational speed, Traverse speed, and Dwell time are selected to optimized with respect to ultimate tensile strength and percentage elongation and chosen the Taguchi quality design concept, and L9 Orthogonal Array table for the experiment, and grey relational grade obtained based on Gray relational analysis method and a value of optimum level of process parameters was identified. Furthermore, significant contributions of process parameters have been determined using analysis of variance. The confirmation tests are carried out to verify the results. The findings of the study confirmed that the selected process parameters were greatly influenced towards optimizing the quality characteristics of ultimate tensile strength & percentage elongation and the optimal process parameters was determined successfully so as to benefit quality weld through this approach and it showed that there exist a relationship between process parameters and responses besides all the considered factors are statistically significant in enhancement of tensile strength. And with the conclusions it was possible to get enhanced tensile strength of pure copper using friction stir welding, the process parameters optimized at tool rotational speed 400 rpm, traverse speed 30 mm/min and dwell time of 5 sec., and dwell time was much affecting the tensile strength. The implementation of friction stir welding process plays a vital role in successful quality improvement of pure copper and this method should further researched.

Tensile strength, Taguchi, Gray Relational: FSW, Copper, Analysis

"PROCESS PARAMETER OPTIMIZATION ON FRICTION STIR WELDED 5 MM DOUBLE SIDE PURE COPPER PLATE FOR TENSILE STRENGTH ENHANCEMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 4, page no.f465-f562, April-2024, Available :http://www.jetir.org/papers/JETIRTHE2099.pdf

"PROCESS PARAMETER OPTIMIZATION ON FRICTION STIR WELDED 5 MM DOUBLE SIDE PURE COPPER PLATE FOR TENSILE STRENGTH ENHANCEMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 4, page no. ppf465-f562, April-2024, Available at : http://www.jetir.org/papers/JETIRTHE2099.pdf