An Investigation on Effect of Welding Current Mode on Weld Quality Characteristics of Microplasma Arc Welding of Inconel 625 Sheets

Authors

  • Dr. Kondapalli Siva Prasad Anil Neerukonda Institute of Technology and Sciences, Visakapatnam
  • Chalamalasetti Srinivasa Rao AU College of Engineering, Andhra University, Visakhapatnam, India
  • Damera Nageswara Rao Centurion University of Technology & Management, Odisha, India

Keywords:

Inconel 625, pulsed current, continuous current, plasma arc welding

Abstract

Nickel alloys have gathered wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resistance, such as metal bellows used in expansion joints in aircraft, aerospace and petroleum industry. In case of single-pass welding of thinner sections of this alloy, pulsed current microplasma arc welding was found beneficial due to its advantages over the conventional continuous current process. The paper focuses on studying the effect of continuous current and pulsed current in welding Inconel 625 sheets using microplasma arc welding (PAW) process. Welding was carried out on 0.25 mm thick Inconel 625 sheets using continuous current mode and pulsed current mode separately, keeping all other welding parameters constant. Weld quality characteristics like microstructure, hardness and tensile properties are investigated and it is found that the usage of pulsed current leads to better weld quality characteristics when compared to continuous current mode.

Author Biographies

  • Dr. Kondapalli Siva Prasad, Anil Neerukonda Institute of Technology and Sciences, Visakapatnam

     Professor, Mechanical Engineering,

  • Chalamalasetti Srinivasa Rao, AU College of Engineering, Andhra University, Visakhapatnam, India
    Department of Mechanical Engineering

Downloads

Published

2019-04-16

Issue

Vol. 3 No. 2 (2013)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.