Articles
  • Process parameters and properties of electric resistance spot welded AISI304-AISI1020 dissimilar weldments

  • Mathi Kannaiyana, Jinu GowthamiThankachi Raghuvaranb,*, Karthikeyan Govindanc and Elaya Perumal Annamalaid

  • aAssistant Professor, Department of Mechanical Engineering, University College of Engineering, Kancheepuram, Tamil Nadu
    bAssistant Professor, Department of Mechanical Engineering, University College of Engineering, Nagercoil, Konam, Tamil Nadu
    cAssistant Professor, Department of Mechanical Engineering, University College of Engineering, Pattukkottai, Rajamadam Tamil Nadu
    dResearch Scholar/SRF (UGC), Department of Mechanical Engineering, University College of Engineering, Nagercoil, Konam, Tamil Nadu

Abstract

In this present work, an attempt was made on optimising the Resistance Spot Welding (RSW) process parameters for joining two dissimilar combinations of AISI 304 and AISI 1020 grade steel with each other. Experiments were conducted by varying the three weld process parameters such as welding current, pressure and welding time. The integrity of the weld joints was evaluated mechanically and metallurgically. Tensile shear fracture, nugget diameter, and hardness properties were examined. Macrostructure, Microstructure, and Scanning Electron Microscopy (SEM) analysis were carried out on the tested samples to validate the type of fracture occurred. Maximum nugget diameter and maximum tensile fracture of 6.666 mm and 10.5 kN were achieved respectively. The experimental results confirmed the validity of the used Response Surface Methodology applied for optimising the welding process parameter in the RSW process. The Response Surface Methodology (RSM) results show that the weld current is the most significant factor for Tensile Shear Fracture Load (TSFL) and nugget diameter, followed by weld pressure and time.


Keywords: Resistance spot welding, Tensile shear fracture, Nugget diameter, Response surface methodology

This Article

  • 2020; 21(1): 26-34

    Published on Feb 28, 2020

  • 10.36410/jcpr.2020.21.1.26
  • Received on Jul 12, 2019
  • Revised on Nov 5, 2019
  • Accepted on Dec 9, 2019

Correspondence to

  • Jinu GowthamiThankachi Raghuvaran

  • Assistant Professor, Department of Mechanical Engineering, University College of Engineering, Nagercoil, Konam, Tamil Nadu
    Tel : +919443994330 Fax: 04652-260510

  • E-mail: grjinu1980@gmail.com