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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/18212
Title: Texture studies of hot compressed near alpha titanium alloy (IMI 834) at 1000°C with different strain rates
Authors: Kodli B.K.
Saxena K.K.
Dey S.R.
Pancholi, Vivek
Bhattacharjee A.
Skrotzki W.
Oertel C.-G.
Published in: Proceedings of IOP Conference Series: Materials Science and Engineering
Abstract: IMI 834 Titanium alloy is a near alpha (hcp) titanium alloy used for high temperature applications with the service temperature up to 600°C. Generally, this alloy is widely used in gas turbine engine applications such as low pressure compressor discs. For these applications, good fatigue and creep properties are required, which have been noticed better in a bimodal microstructure, containing 15-20% volume fraction of primary alpha grains (α<inf>p</inf>) and remaining bcc beta (β) grains transformed secondary alpha laths (α<inf>s</inf>). The bimodal microstructure is achieved during processing of IMI 834 in the high temperature α+β region. The major issue of bimodal IMI 834 during utilization is its poor dwell fatigue life time caused by textured macrozones. Textured macrozone is the spatial accumulation of similar oriented grains in the microstructure generated during hot processing in the high temperature α+β region. Textured macrozone can be mitigated by controlling the hot deformation with certain strain rate under stable plastic conditions having β grains undergoing dynamic recrystallization. Hence, a comprehensive study is required to understand the deformation behavior of α and β grains at different strain rates in that region. Hot compression tests up to 5°% strain of the samples are performed with five different strain rates i.e. 10-3 s-1, 10-2 s-1, 10-1 s-1, 1 s-1 and 10 s-1 at 1000°C using Gleeble 3800. The resultant bimodal microstructure and the texture studies of primary alpha grains (α<inf>p</inf>) and secondary alpha laths (α<inf>s</inf>) are carried out using scanning electron microscopy (SEM)-electron back scattered diffraction (EBSD) method. © Published under licence by IOP Publishing Ltd.
Citation: Proceedings of IOP Conference Series: Materials Science and Engineering, (2015)
URI: https://doi.org/10.1088/1757-899X/82/1/012032
http://repository.iitr.ac.in/handle/123456789/18212
Issue Date: 2015
Publisher: Institute of Physics Publishing
Keywords: Alloys
Compression testing
Deformation
Dynamic recrystallization
Fatigue of materials
Gas compressors
Gas turbines
High temperature applications
Microstructure
Scanning electron microscopy
Textures
Titanium
Titanium alloys
Bi-modal microstructures
Creep properties
Deformation behavior
Electron back-scattered diffraction
IMI-834 titanium alloy
Low pressure compressor
Near alpha titanium alloys
Service temperature
Strain rate
ISSN: 17578981
Author Scopus IDs: 56613377800
56612928200
8352504300
14071738800
8219614100
Author Affiliations: Kodli, B.K., Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram-, Telangana, 502205, India
Saxena, K.K., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Dey, S.R., Department of Materials Science and Metallurgical Engineering, Indian Institute of Technology Hyderabad, Yeddumailaram-, Telangana, 502205, India
Pancholi, V., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, 247667, India
Bhattacharjee, A., Titanium Alloy Group, Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh, Telangana, 500058, India
Appears in Collections:Conference Publications [MT]

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