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Hot deformation behaviour of Mo-TZM and understanding the restoration processes involved

Chaudhuri, Atanu and Behera, Ananta N and Sarkar, Apu and Kapoor, Rajeev and Ray, Ranjit K and Suwas, Satyam (2019) Hot deformation behaviour of Mo-TZM and understanding the restoration processes involved. In: ACTA MATERIALIA, 164 . pp. 153-164.

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Official URL: https://doi.org/10.1016/j.actamat.2018.10.037

Abstract

Hot deformation behaviour of Mo-TZM alloy over a temperature range of 1400-1700 degrees C and strain rate range of 0.001-10.0 s(-1) was investigated. The microstructure after deformation was characterized at each deformation condition using electron back scatter diffraction technique. The high strain rate sensitivity domain was found to be in the strain rate range of 10(-2) - 10(-3) s(-1) and in temperature range of 1480-1650 degrees C. The flow stress behaviour of the material indicated dynamic recovery as well as recrystallization of the material during deformation. Microstructural investigation confirmed the occurrence of continuous dynamic recrystallization from 1400 to 1500 degrees C. At higher temperature (1600-1700 degrees C) and low strain rates (10(-2) - 10(-3) s(-1)) grain growth was dominant. At high strain rates (0.1-10 s(-1)) and high temperature (1600-1700 degrees C) dynamic recrystallization was not observed. Based on the experimental observations a schematic model of the microstructure evolution of TZM during deformation at high temperatures was proposed. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to PERGAMON-ELSEVIER SCIENCE LTD
Keywords: Molybdenum alloy; Mo-TZM; High temperature deformation; EBSD; Dynamic recovery; Dynamic recrystallization
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 19 Feb 2019 05:41
Last Modified: 19 Feb 2019 05:41
URI: http://eprints.iisc.ac.in/id/eprint/61757

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