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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/12831
Title: Flow behaviour of TiHy 600 alloy under hot deformation using gleeble 3800
Authors: Kodli B.K.
Karre R.
Saxena K.K.
Pancholi V.
Dey S.R.
Bhattacharjee A.
Published in: Advances in Materials and Processing Technologies
Abstract: To understand deformation behaviour of TiHy 600 alloy at higher temperatures, hot compression tests are performed in α region (1173 K), α + β regions (1223, 1248, and 1273 K) and β region (1323 K) at strain rates (0.001, 0.01, 0.1, 1 and 10/s) for up to 50% deformation in Gleeble 3800 ® thermo-mechanical simulator. Flow curve plots are drawn at each strain rates and temperatures and it is observed that dominant deformation mechanism at higher temperature 1323 K (β region) and strain rates (1 and 10/s) is dynamic recovery (DRV) whereas dynamic recrystallization (DRX) is mostly observed at lower strain rates (0.001, 0.01/s) in medium temperature range of 1223 K (α region) to 1248 K (α + β region). Hyperbolic sine law equation is used to calculate the activation energy (Q) and other material sensitive parameters (A, α and n 1 ). The activation energies for DRX in α region and DRV in β region are obtained as 384 and 251 kJ/mol. Experimental peak stress values are compared with predicted peak stress values (R 2  = 96.2%) and Zener-Hollomon parameter (R 2  = 94.3%). The flow stress behavior up to the peak stress is verified with Cingara equation. Finally, calculated prediction results of DRX volume fraction obtained from Avrami equation is compared with experimental observed microstructure. © 2017, © 2017 Informa UK Limited, trading as Taylor & Francis Group.
Citation: Advances in Materials and Processing Technologies (2017), 3(4): 490-510
URI: https://doi.org/10.1080/2374068X.2017.1342065
http://repository.iitr.ac.in/handle/123456789/12831
Issue Date: 2017
Publisher: Taylor and Francis Ltd.
Keywords: activation energy
compression
dynamic recovery
Dynamic recrystallization
microstructure
peak stress
ISSN: 2374068X
Author Scopus IDs: 56613377800
56507320200
56612928200
14071738800
8352504300
8219614100
Author Affiliations: Kodli, B.K., Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
Karre, R., Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
Saxena, K.K., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Pancholi, V., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Dey, S.R., Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, India
Bhattacharjee, A., Defence Metallurgical Research Laboratory (DMRL), Titanium Alloy Group, Hyderabad, India
Corresponding Author: Dey, S.R.; Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology HyderabadIndia; email: suhash@iith.ac.in
Appears in Collections:Journal Publications [MT]

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