Hot deformation characteristics and microstructural evolution of Ti-900 alloy

Chakraborty, D and Shankar, G and Prajapati, A and Chandra Obul Reddy, BR and Kumar, A (2024) Hot deformation characteristics and microstructural evolution of Ti-900 alloy. In: Materials Letters, 355 .

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Abstract

Hot deformation behaviour of Ti-900 (Ti-6.5Al-3.2Mo-1.8Zr-0.25Si) alloy has been analyzed by conducting an isothermal hot compression test at 850 °C to 1050 °C temperatures and strain rates between 0.001 s−1 to 10 s−1. The effect of strain rates and deformation temperature on flow stress is investigated. The processing maps are constructed, and constitutive equations are studied to understand the formability of the novel titanium alloy in the different temperatures and strain rates regimes. Results suggest that temperatures and strain rates between 880 °C to 950 °C and 0.001 s−1 to 0.01 s−1 are the optimal processing window for this alloy. The kinetic rate equation indicates that the apparent activation energy for deformation is 531 kJ/mol in the α + β region. Post deformation microstructure formation is also studied.

Item Type:	Journal Article
Publication:	Materials Letters
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Activation energy; Aluminum alloys; Compression testing; Constitutive equations; Hot working; Microstructural evolution; Molybdenum alloys; Silicon alloys; Titanium alloys; Zircaloy, Deformation Characteristics; Deformation temperatures; Effects of strain rates; Hot deformation behaviors; Hot-compression tests; Metals and alloys; On flow; Processing maps; Strain deformation; Strain-rates, Strain rate
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	27 Feb 2024 09:28
Last Modified:	27 Feb 2024 09:28
URI:	https://eprints.iisc.ac.in/id/eprint/83610

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