Determination of global and local tensile behaviours of laser welded Ti-6Al-4V alloy

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DOIResolve DOI: http://doi.org/10.4028/www.scientific.net/AMR.409.859
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TypeArticle
Proceedings titleAdvanced Materials Research
Conference7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, August 1-5, 2011, Quebec City, QC, Canada
ISSN1022-6680
Volume409
SubjectDefocusing; Digital image correlations; Failure locations; Full-field; Fusion zones; ND : YAG lasers; Tensile behaviour; Three-dimensional deformations; Ti-6Al-4V; Ti-6Al-4V alloy; Underfills; Welding speed; Alloys; Aluminum; Cerium alloys; Elastic moduli; Fracture; Heat affected zone; Neodymium lasers; Plastic deformation; Tensile properties; Three dimensional; Titanium; Vanadium; Vanadium alloys; Welding; Yield stress; Titanium alloys
AbstractIn this study, the global and local tensile behaviours of laser welded 5.1-mm thick Ti-6Al-4V alloy were obtained at various welding speeds and defocusing distances using a digital image correlation (DIC) technique with a full field three-dimensional deformation measurement system. The local tensile properties including elastic modulus, yield stress, and maximum plastic strain were determined at various locations by assuming an iso-stress condition. It was found that the elastic modulus and yield stress were maximum in the fusion zone (FZ) and minimum in the heat-affected zone (HAZ). Porosity and underfill defects were the main reasons for the failures in the FZ and/or the HAZ. Maximum plastic strain at fracture was observed at the failure location in most cases.
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Aerospace Research
Peer reviewedYes
NPARC number21270214
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Record identifier326a8698-219c-43c5-a7c2-81db9933dae1
Record created2014-01-13
Record modified2016-05-09
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