Study on Effect of Welding Speed on Micro Structure and Mechanical Properties of Pulsed Current Micro Plasma Arc Welded Inconel 625 Sheets

Chalamalasetti Srinivasa Rao, Kondapalli Siva Prasad, Damera Nageswara Rao

Department of Mechanical Engineering, Anil Neerukonda Institute of Technology & Sciences, Visakhapatnam, India.
Department of Mechanical Engineering, AU College of Engineering, Andhra University, Visakhapatnam, India.
Vice Chancellor, Centurion University of Technology & Management, Odisha, India.

DOI: 10.4236/jmmce.2012.1110106                

Abstract

Nickel alloys had gathered wide acceptance in the fabrication of components which require high temperature resistance and corrosion resistance, such as metallic bellows used in expansion joints used in aircraft, aerospace and petroleum industry. Micro Plasma Arc Welding (MPAW) is one of the important arc welding processes commonly using in fabric- cation of Nickel alloys. In the present paper welding of Inconel 625 sheets using pulsed current micro plasma arc weld- ing was discussed. The paper mainly focuses on studying the weld quality characteristics like weld pool geometry pa- rameters, microstructure, grain size, hardness and tensile properties of Pulsed Current Micro Plasma Arc Welded In- conel 625 sheets at different welding speeds. Results reveals that at a welding speed of 260 mm/minute better weld quality characteristics can be obtained.

Keywords

Pulsed Current Micro Plasma Arc Welding; Inconel 625; Grain Size; Hardness; Tensile Properties

Conflicts of Interest

The authors declare no conflicts of interest.

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