Relationship between the Textures and the Elastic Moduli of Electron Beam Welded Joint in Ti-6Al-4V Titanium Alloy

Abstract:

The microstructure, texture and elastic modulus of electron beam welding joint in Ti-6Al-4V titanium alloy were investigated by transmission electron microscopy, X-ray diffraction, electron back scattered diffraction and nanoindentation techniques. The α phase was in the majority, and a {0001} <-2110> texture of α phase was observed in the base material. A very weak {11-23} <-1-122> texture of α phase was in the fuse zone. Most of the α grain boundaries in the fuse zone were high-angle boundaries by electron backscattered diffraction, and it also confirmed that the orientations of α phase had a nearly random distribution in the fuse zone. The maximum average elastic modulus value measured by the nanoindentation techniques was in the base material due to the effect of the {0001} <-2110> texture. The average elastic moduli of three different zones in the joint were 134.8±3.5Gpa, 125.5±5.8Gpa and 123.0±4.7Gpa, respectively.

• Periodical: Advanced Materials Research (Volume 936)
• Pages: 1910-1917
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.936.1910
• Online since: June 2014
• Authors: Xing Zhi Li*, Shu Bing Hu
• Keywords: Elastic Modulus, Electron Back Scattered Diffraction (EBSD), Electron Beam Welding, Nanoindentation, Texture, Titanium Alloy

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