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Hot Deformation and Dynamic Recrystallization in Titanium Aluminide

Bibhanshu, Nitish and Suwas, Satyam (2018) Hot Deformation and Dynamic Recrystallization in Titanium Aluminide. In: 10th International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications (THERMEC), JUL 09-13, 2018, Cite Sci Paris, Paris, FRANCE, pp. 1391-1396.

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Official URL: https://doi.org/10.4028/www.scientific.net/MSF.941...

Abstract

The hot workability of gamma titanium aluminide alloy, Ti-48Al-2V-2Nb, was assessed in the cast condition through a series of compression tests conducted over a range of temperatures (1000 to 1175 degrees C) and at the strain rate of 10 S-1. The mechanism of dynamics recrystallization has been investigated from SEM Z-contrast images and from the Electron backscattered diffraction EBSD as well. It has been observed that volume fraction of the recrystallized grains increases with increasing the deformation temperature. The major volume fraction of the recrystallized grains was observed in the shear band which was forming at an angle 45 degrees with respect to the compression direction. The mechanism of breaking of the laths and the region of the dynamic recrystallization were also investigated from the SEM Z-contrast image and EBSD. The dynamic recrystallization occurred in the region of the broken laths and shear bands. The breaking of the laths was because of the kinking of the lamellae. The shear band, kinked lamellae and dynamic recrystallized region where all investigated simultaneously.

Item Type: Conference Proceedings
Additional Information: 10th International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications (THERMEC), Cite Sci Paris, Paris, FRANCE, JUL 09-13, 2018
Keywords: Hot Deformation; Gleeble; Dynamic Recrystallization (DRX); SEM Z-Contrast Image; EBSD; Texture; Titanium Aluminide
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 18 Jul 2019 06:59
Last Modified: 18 Jul 2019 06:59
URI: http://eprints.iisc.ac.in/id/eprint/62911

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