Hybrid Laser-Arc Welding of HSLA-65 Steel Plate: Microstructural and Mechanical Property Evaluation of Butt Welds

Cameron Munro; Allison E. Nolting; Xin Jin Cao; Priti Wanjara

doi:10.4028/www.scientific.net/MSF.706-709.2992

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HomeMaterials Science ForumMaterials Science Forum Vols. 706-709Hybrid Laser-Arc Welding of HSLA-65 Steel Plate:...

Hybrid Laser-Arc Welding of HSLA-65 Steel Plate: Microstructural and Mechanical Property Evaluation of Butt Welds

Abstract:

High strength low alloy (HSLA) steel, namely HSLA-65, has shown promise as a replacement for more common high strength shipbuilding steels. However, conventional high heat input welding processes can cause significant distortion, often requiring expensive post-weld reworking. Butt welds in HSLA-65 steel were fabricated using a hybrid fibre laser-gas metal arc welding (GMAW) procedure to investigate the efficacy of distortion mitigation via low heat input joining. Heat input from the laser and arc sources were roughly equal at ~5.2 kW each, and plates were welded in either the laser-leading or arc-leading configuration. In either case, butt welds in ~9 mm thick plates could be made in a single pass at a total heat input of ~0.4 kJ/mm. Welding induced distortion was minimal. Analysis of the microstructure and microhardness of the welds is provided, along with some preliminary results of mechanical and impact testing.

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Periodical:

Materials Science Forum (Volumes 706-709)

Pages:

2992-2997

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.706-709.2992

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Online since:

January 2012

Authors:

Cameron Munro, Allison E. Nolting, Xin Jin Cao, Priti Wanjara

Keywords:

Arc, HSLA-65, Hybrid, Laser, MAG, Welding

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