Determination of Global and Local Tensile Behaviours of Laser Welded Ti-6Al-4V Alloy

Abstract:

In 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.

• Periodical: Advanced Materials Research (Volume 409)
• Pages: 859-864
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.409.859
• Online since: November 2011
• Authors: Syed Humaun Kabir Abu, Xin Jin Cao, Javad Gholipour, Priti Wanjara, Jonathan Cuddy, Anand Birur, Mamoun Medraj
• Keywords: Nd:YAG Laser, Tensile Properties, Ti6Al4V, Titanium Alloy

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