Pulsed Current GMAW for Superior Weld Quality of Austenitic Stainless Steel Sheet

The performance of pulsed current gas metal arc welding (P-GMAW) and conventional gas metal arc welding (GMAW) processes in welding of 2.5 mm thin stainless steel sheet at different heat input has been studied. The use of P-GMAW at low heat input has been found superior to the use of GMAW process wi...

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Published in:ISIJ International 2007, Vol.47(1), pp.138-145
Main Authors: Ghosh, Prakriti Kumar, Kulkarni, Shrirang Gurunath, Kumar, Manish, Dhiman, Harsh Kumar
Format: Article
Language:English
Subjects:
Applied sciences
austenitic stainless steel
Corrosion
Corrosion environments
Exact sciences and technology
heat input
inter granular corrosion
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
P-GMAW
weld geometry
Welding
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creator Ghosh, Prakriti Kumar
Kulkarni, Shrirang Gurunath
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description The performance of pulsed current gas metal arc welding (P-GMAW) and conventional gas metal arc welding (GMAW) processes in welding of 2.5 mm thin stainless steel sheet at different heat input has been studied. The use of P-GMAW at low heat input has been found superior to the use of GMAW process with respect to significant reduction in intergranular corrosion (IGC) susceptibility along with considerable improvement in some other characteristics of weld joint by maintaining comparable mechanical properties. It was further observed that the IGC, weld geometry and microstructure of P-GMA weld joint are largely governed by pulse parameters, and varies as a function of factor φ, defined as a summarized influence of pulse parameters such as peak current, base current, pulse-off time and pulse frequency. The increase of φ has been found favourable to reduce IGC, weld geometry along with refinement of the cast (dendritic) structure of weld deposit.
doi_str_mv 10.2355/isijinternational.47.138
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source Free Full-Text Journals in Chemistry
subjects Applied sciences
austenitic stainless steel
Corrosion
Corrosion environments
Exact sciences and technology
heat input
inter granular corrosion
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
P-GMAW
weld geometry
Welding
title Pulsed Current GMAW for Superior Weld Quality of Austenitic Stainless Steel Sheet
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