Abstract
Titanium alloy Ti5Al3Mo1.5V is used in the fabrication of critical engine components for space applications. Double vacuum arc re-melted and (α + β) forged blocks were sliced into 10-mm-thick plates and subjected to electron beam welding (EBW) with five different variants of prior and post-weld heat treatment conditions. Effects of various heat treatment conditions on the mechanical properties of the weldments have been studied. The welded coupons were characterized for microstructure, mechanical properties, and fracture analysis. An optimized heat treatment and welding sequence has been suggested. Weld efficiency of 90% could be achieved. Weldment has shown optimum properties in solution treated and aged condition. Heat-affected zone adjacent to weld fusion line is found to have lowest hardness in all conditions.
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The authors are thankful to National Facility of OIM and Texture Lab, IIT Bombay for EBSD support and MCD, VSSC for microstructure/fractography examination. The authors are also thankful to IFF, MME, VSSC for specimens fabrication support. The authors would like to acknowledge Director, VSSC for his kind permission to publish this work.
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Anil Kumar, V., Gupta, R.K., Manwatkar, S.K. et al. Effect of Prior and Post-Weld Heat Treatment on Electron Beam Weldments of (α + β) Titanium alloy Ti-5Al-3Mo-1.5V. J. of Materi Eng and Perform 25, 2147–2156 (2016). https://doi.org/10.1007/s11665-016-2111-7
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DOI: https://doi.org/10.1007/s11665-016-2111-7