Effect of Microstructure State of Titanium Alloy Ti-6Al-4V on Structure and Mechanical Properties of Joints Produced by Diffusion Bonding Process

Abstract:

The studies of diffusion bonded samples of Ti-6Al-4V and Nitinol alloys were carried out considering the titanium alloy in two states: ultra-fine grained and bi-modal microstructures, the last one consisted of small and large α-phase grains. Depending on microstructure and chemical composition of the alloys, the diffusion bonding had been made at temperatures from 600°C to 850°C. The microstructures of joints was studied by scanning electron microscope using detector of backscattering electron diffraction. The shear strengths of joints were measured. It was concluded that the ultra-fine grained Ti-6Al-4V alloy could be applied for joints manufactured at a temperature lower than 750°C. The bi-modal Ti-6Al-4V alloy is an effective material for producing the joints at the temperature larger that 750°C.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2659-2664
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2659
• Online since: May 2014
• Authors: Nikolay Lopatin*, Kirill Senkevich, Egor A. Kudryavtsev
• Keywords: Diffusion Bonding, Microcrystalline Ti-6Al-4V, Microstructure, Nitinol, Shear Strength, Ultra-Fine Grained Ti-6Al-4V

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