The Effect of an External Magnetic Field on the Aspect Ratio and Heat Input of Gas-Metal-Arc-Welded AZ31B Alloy Weld Joints Using a Response Surface Methodology

Pankaj Sharma; Somnath Chattopadhyaya; Nirmal Kumar Singh; Marta Bogdan-Chudy; Grzegorz Krolczyk

doi:10.3390/ma13225269

The Effect of an External Magnetic Field on the Aspect Ratio and Heat Input of Gas-Metal-Arc-Welded AZ31B Alloy Weld Joints Using a Response Surface Methodology

Materials (Basel). 2020 Nov 21;13(22):5269. doi: 10.3390/ma13225269.

Authors

Pankaj Sharma¹, Somnath Chattopadhyaya¹, Nirmal Kumar Singh¹, Marta Bogdan-Chudy², Grzegorz Krolczyk²

Affiliations

¹ Department of Mechanical Engineering, Indian Institute of Technology (ISM), Dhanbad 826004, India.
² Department of Manufacturing Engineering and Automation, Opole University of Technology, 45758 Opole, Poland.

Abstract

This study attempted to analyze and optimize the effect of an external magnetic field (EMF) on the aspect ratio and heat input for AZ31B weld joints that were welded using the gas metal arc welding (GMAW) process. The response surface methodology (RSM) was adopted for the critical analysis, and subsequently, mathematical models were developed based on the experimental results. It was observed that the EMF and its interaction with the wire feed rate significantly affected the aspect ratio and heat input, respectively. At 119 G (magnetic field), 700 mm/min (welding speed), 5.8 m/min feed rate, and 11.5 L/min (gas flow rate), the aspect ratio was 2.26, and the corresponding heat input factor (HI_f) was 0.8 with almost full weld penetration.

Keywords: AZ31B; EMF; GMAW; HIf; RSM; aspect ratio.