Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 795, Issue -, Pages 151-162Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.04.272
Keywords
Two-phase alpha plus beta titanium alloy; Cooling rate; Basketweave; Martensite; Tension-compression asymmetry; Strain-induced phase transformation
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Funding
- VSSC through ISRO-IITM cell
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An investigation was conducted to understand the role of microstructure on the asymmetry of mechanical properties in quasi-static tension and compression in a two-phase titanium alloy Ti-5Al-3Mo-1.5V. Different microstructures were obtained (lamellar colony, basketweave and martensitic) on adopting different cooling rates after solution treatment in single phase beta region. The microstructure with martensite exhibited higher strain to failure and lower yield strength than basketweave. Detailed TEM microstructural analysis helped reveal the existence of compression twins and strain-induced phase transformation in compression and tension tests respectively, both of which are relatively rare to be observed in two-phase titanium alloys. (C) 2019 Elsevier B.V. All rights reserved.
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