On process-structure-property interconnection in anti-phase synchronised twin-wire GMAW of low carbon steel

Moinuddin, S Q and Kapil, A and Kohama, K and Sharma, Abhay and Ito, K and Tanaka, M (2016) On process-structure-property interconnection in anti-phase synchronised twin-wire GMAW of low carbon steel. Science and Technology of Welding and Joining, 61 (6). pp. 452-459. ISSN 1362-1718

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Abstract

The paper investigates process-structure-property interconnection in anti-phase synchronised twin-wire gas metal arc welded low carbon steel samples wherein process variation is achieved by using similar and dissimilar currents and diameters at lead and trail wires. Scanning electron microscopy and microhardness measurements are used as characterisation techniques. The investigation offers new observations on heat generation and distribution in twin-wire welding that affect weld bead and microstructure formation due to changes in arc phenomenon and molten metal flow in weld pool. Use of dissimilar currents facilitates effective utilisation of heat. The two-stage arcing in twin-wire welding facilitates slow heating and cooling that leads to weld metal and heat affected zone softening. A combination of polygonal ferrite, pearlite and bainite with varying compositions is observed across the weldment. A higher current value and larger wire diameter at the lead wire leads to coarsening of the grains thereby reducing the hardness.

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IITH Creators:
IITH CreatorsORCiD
Sharma, AbhayUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Twin-wire GMAW process; Microstructure; Mechanical properties; Heat input; Current density
Subjects: Others > Mechanics
Depositing User: Team Library
Date Deposited: 26 Jul 2016 05:16
Last Modified: 16 Jan 2019 08:01
URI: http://raiith.iith.ac.in/id/eprint/2583
Publisher URL: http://dx.doi.org/10.1080/13621718.2015.1124960
OA policy: http://www.sherpa.ac.uk/romeo/issn/1362-1718/
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