Study on Weld Quality Characteristics of Pulsed Current Micro Plasma Arc Welding of Inconel625 Sheets

K. Siva  Prasad; Ch.Srinivasa  Rao; D.Nageswara  Rao

doi:10.4236/jmmce.2012.112010

K. Siva Prasad^*, Ch.Srinivasa Rao, D.Nageswara Rao

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. In the present paper an attempt is made to study various weld quality characteristics like weld bead geometry dimensions, micro hardness, microstructure, grain size and tensile properties of Pulsed Current Micro Plasma Welding of Inconel625sheets. Weld joint was prepared by fusing the two parent metals of Inconel625 sheets. Square butt joint is used and welding was carried out using Pulsed DCEN, without filler wire. Peak current, back current, pulse and pulse width are considered as the main influential input variables during the welding.

Keywords: pulsed current, micro plasma arc welding, Inconel625, weld bead geometry, hardness, microstructure, grain size.

Cite this paper: K. Prasad, C. Rao and D. Rao, "Study on Weld Quality Characteristics of Pulsed Current Micro Plasma Arc Welding of Inconel625 Sheets," Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 2, 2012, pp. 133-141. doi: 10.4236/jmmce.2012.112010.

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