Effect of postweld heat treatment on microstructure, hardness, and tensile properties of laser-welded Ti-6Al-4V

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DOIResolve DOI: http://doi.org/10.1007/s11661-012-1230-5
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TypeArticle
Journal titleMetallurgical and Materials Transactions A
ISSN1073-5623
1543-1940
Volume43
Issue11
Pages41714184; # of pages: 14
AbstractThe effects of postweld heat treatment (PWHT) on 3.2-mm- and 5.1-mm-thick Ti-6Al-4V butt joints welded using a continuous wave (CW) 4-kW Nd:YAG laser welding machine were investigated in terms of microstructural transformations, welding defects, and hardness, as well as global and local tensile properties. Two postweld heat treatments, i.e., stress-relief annealing (SRA) and solution heat treatment followed by aging (STA), were performed and the weld qualities were compared with the as-welded condition. A digital image correlation technique was used to determine the global tensile behavior for the transverse welding samples. The local tensile properties including yield strength and maximum strain were determined, for the first time, for the laser-welded Ti-6Al-4V. The mechanical properties, including hardness and the global and local tensile properties, were correlated to the microstructure and defects in the as-welded, SRA, and STA conditions.
Publication date
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
Identifier1230
NPARC number21268422
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Record identifierce2d4866-c3c7-4b91-8df0-96b2b9022e10
Record created2013-07-11
Record modified2016-05-09
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