Title: Critical aspects of pulse current GMA welding of stainless steel influencing metallurgical characteristics

Authors: Shrirang G. Kulkarni; B.P. Agrawal; P.K. Ghosh; Subrata Ray

Addresses: L&T Shipbuilding Limited, Kattupalli Village, Ponneri Taluk, Tiruvallur District – 600120, Chennai Tamil Nadu, India ' School of Mechanical Engineering, Galgotias University, Greater Noida, G B Nagar – 201308, Uttar Pradesh, India ' Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee – 247 667, Uttarakhand, India ' IIT, Mandi, Himachal Pradesh, 175005, India

Abstract: Metallurgical characteristics of the weld of austenitic stainless steel (ASS) has been studied as a function of pulse parameters, heat input and heat transferred to the weld pool in pulsed current gas metal arc welding (P-GMAW) process. The combined influence of these three aspects on microstructure and hardness of weld bead and the heat affected zone has been thoroughly investigated. Intergranular corrosion susceptibility of heat affected zone of different weld has also been investigated. The characteristics of pulse current gas metal arc weld have been compared with conventional gas metal arc welds at similar heat inputs. The pulse parameters are suggested which will produce superior quality relative to gas metal arc welding (GMAW) as a research goal. The superiority of pulse current gas metal arc weld has been justified.

Keywords: P-PMAW; pulse current gas metal arc welding; pulse parameters; microstructure; inter granular corrosion; ASS; austenitic stainless steel.

DOI: 10.1504/IJMMP.2017.092164

International Journal of Microstructure and Materials Properties, 2017 Vol.12 No.5/6, pp.363 - 390

Received: 14 Sep 2017
Accepted: 06 Dec 2017
Published online: 06 Jun 2018 *

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