Friction Stir and Cold Metal Transfer Welding Of AA7075: Experimental Investigations and Machine Learning Approaches

Authors

  • Dr. S. Rajkumar Department of Mechanical Engineering, Institute of Technology, Hawassa University, Hawassa.

Keywords:

Friction Stir Welding;, Cold Metal Transfer Welding, AA7075, Microstructures, Mechanical Properties, Machine Learning Techniques

Abstract

Frictions stir welding (FSW) and cold metal transfer (CMT) welding processes are ideal for joining aluminium and its alloys. FSW and CMT are clearly distinguished by their working principle, one is solid state type and other is fusion type welding process. This paper attempted to study the effectiveness of both processes on aluminium alloy. AA7075 is a heat treatable alloy and most suitable for dynamic applications owing to its exceptional characteristics. Structure and mechanical properties of the joints produced by FSW and CMT are investigated. Experimental results revealed that the performance of FSW is better than the CMT in metallurgical and mechanical aspects. The fine structure and homogenous distribution of particles in FSW joints results in strengthening mechanism unlike CMT, where the particles are uneven and coarse-grained. However, CMT can produce welds with higher speeds and can achieve performance at par with FSW. Further, machine learning techniques, polynomial regression and support vector machine are applied to derive the relationships between process parameters and strength parameters.

Author Biography

Dr. S. Rajkumar, Department of Mechanical Engineering, Institute of Technology, Hawassa University, Hawassa.

Dr. S. RAJKUMAR working as an Assistant Professor in the Department of Mechanical Engineering, Faculty of Manufacturing, Institute of Technology, Hawassa University, Ethiopia. He has acquired Fifteen years of Teaching and Research experience in various reputed engineering colleges and universities. He did a Ph.D. from Anna University, Chennai in the year 2014. He completed the Master of Social Work from Annamalai University in the year of 2009. Also, he completed the Master of Business Administration from Allagappa University in the year 2008; He completed the Master of Engineering in the specialization of Engineering Design From Anna University in the year 2006.  He published more than fifty research papers in International journals and International conferences. He actively participates in more than ten Professional Societies. He was the Reviewer and Editorial Board Member in the various reputed international journals.

 

Published

2022-03-04

How to Cite

Dr. S. Rajkumar. (2022). Friction Stir and Cold Metal Transfer Welding Of AA7075: Experimental Investigations and Machine Learning Approaches. Ethiopian Journal of Engineering and Technology, 1(1), 1-14. Retrieved from https://journals.hu.edu.et/hu-journals/index.php/ejet/article/view/331