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Metal Joining Techniques Using Brazing
Published in Yoseph Bar-Cohen, Advances in Manufacturing and Processing of Materials and Structures, 2018
Yoseph Bar-Cohen, Dusan P. Sekulic, Rui Pan, Sudarsanam Suresh Babu, Anming Hu, Denzel Bridges, Xiaoqi Bao, Mircea Badescu, Hyeong Jae Lee, Stewart Sherrit
At the end of the 1940s, titanium alloys were rapidly developed for aerospace systems with their ideal combination of high strength, creep resistance, anticorrosion properties, and low density (Peters et al. 2003). Titanium alloys are used for compressors in gas turbine engines and high-strength aerospace structures. Despite the high melting point (~1600°C) of pure titanium, the maximum temperature of titanium alloys is limited by their propensity to ignite at low temperatures (e.g., for Ti-6Al-4V, it is 315°C). High-temperature near-α titanium alloys (mainly alloyed with Al, Mo, Si, Cr, V, etc., like Ti-8Al-1Mo-1V and Ti-6Al-2Sn-4Zr-2Mo-0.1Si) can be used up to 540°C (Peters et al. 2003). Within these temperature limits, they can be an attractive substitute for Ni-based alloys and steel for higher-temperature lightweight parts in aircraft and rocket engines. The development of intermetallic alloys based on titanium aluminides (TiAl and Ti3Al) can shift application temperatures to 650°C or even 800°C while maintaining excellent creep resistance and mechanical performance (Boyer 1996).
Linear friction welded titanium alloy joints: a brief review of microstructure evolution and mechanical properties
Published in Welding International, 2022
Other α + β titanium alloy joints have been produced with LFW, such as Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) joints [34–36], and near α titanium alloys joints, like Ti–6Al–2Sn–4Zr–2Mo (Ti-6242) joints [37,38] or Ti-6Al-2Zr-1Mo-1V joint [39], whose microstructures are similar to that of Ti64 joints. There are Widmanstätten structures or martensitic structures detected in the WCZ. In addition, Guo et al. [40] found orthorhombic α’’ martensite in the WCZ of Ti–6Al–2Sn–4Zr–6Mo (Ti-6246, α + β titanium alloy) joint.