Microstructure and Mechanical Properties of Gas-Tungsten-Arc–Welded Ti-15-3 Beta Titanium Alloy |
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| Authors: | K. Balachandar V. Subramanya Sarma Bhanu Pant G. Phanikumar |
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| Affiliation: | (1) Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai, 600036, India;(2) Vikram Sarabhai Space Center, Thiruvananthapuram, 695 022, India;; |
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| Abstract: | Microstructure and mechanical properties of gas-tungsten-arc (GTA)–welded Ti-15V-3Cr-3Sn-3Al alloy in direct current electrode negative mode are characterized. The thermal profile was measured during welding with continuous current (CC) and pulsed current (PC) at different frequencies. A single-step postweld aging of the welded samples at subtransus temperature was attempted to study precipitation of alpha phase. Two different morphologies of alpha phase are observed along with a partitioning of alloying elements into the two phases. Processing conditions for higher strength are identified and correlated with the thermal profile. Microstructure changes due to postweld heat treatment were characterized. |
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