Microstructure and Mechanical Properties of Al5052 – SS304 Dissimilar Weld Lap Joint by Pulsed Cold Metal Transfer Process
Md Anwar†, Mudda Nirish†*, R.Rajendra†
†Department of Mechanical Engineering, University College of Engineering (A), Osmania University, Telangana, India.
Corresponding Author Email: [email protected]
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The welding of thin sheet metal products from aluminium (Al5052) and stainless steel (SS304) by using pulsed cold metal transfer (P-CMT) process. The pulsed CMT technology enables the reduction of distortions and increased productivity through low heat input less spatter welding joint. This is mainly due to low heat input, achieved by controlled movement of the electrode ER 4043. The aim of this study was to optimise the process parameters by pulsed CMT process. The output parameter studied tensile strength, microstructure, and microhardness were determined in the fusion zone and heat affected zone (HAZ). The super low heat input and the addition of Si inhibited the creation and growth of brittle intermetallic compound layer in the weld metal, which improved the strength of the joint. The results show that no-spatter welding and low heat input during the welding process can be realized by pulsed CMT in the dissimilar metal joint with good mechanical properties.