Hybrid laser-arc welding of HSLA-65 steel plate: Microstructural and mechanical property evaluation of butt welds

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DOIResolve DOI: http://doi.org/10.4028/www.scientific.net/MSF.706-709.2992
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TypeArticle
Proceedings titleMaterials Science Forum
Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, 1 August 2011 through 5 August 2011, Quebec City, QC
ISSN0255-5476
ISBN9783037853030
Volume706-709
Pages29922997; # of pages: 6
SubjectArc; Butt welds; Heat input; High heat input welding; High strength; High strength low alloy steels; HSLA-65; Hybrid; Hybrid fibres; Laser-arc; MAG; Mechanical property evaluation; Metal arc welding; Micro-structural; Ship-building steels; Single pass; Steel plates; Thick plate; Welding-induced distortion; Alloy steel; Electric welding; Gas metal arc welding; High strength alloys; Impact testing; Lasers; Mechanical properties; Steel fibers; Welding; Welds; Hybrid materials; Shipbuilding materials; Ships; Strength of materials; High strength steel
AbstractHigh 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. © 2012 Trans Tech Publications, Switzerland.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Aerospace Research
Peer reviewedYes
NPARC number21269356
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Record identifiera0558147-719a-4469-88bb-cee864bfcc9f
Record created2013-12-12
Record modified2016-05-09
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