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Unstable flow during hot deformation of Ti-24Al-20Nb alloy

Sagar, PK and Banerjee, D and Prasad, YVRK (1997) Unstable flow during hot deformation of Ti-24Al-20Nb alloy. In: Materials Science and Technology, 13 (9). pp. 755-760.

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Unstable flow during hot deformation of an alpha(2) titanium aluminide alloy Ti-24Al-20Nb alloy was analysed using two criteria, one of which was developed by Jonas and the other by Kalyankumar. Workability maps were constructed using the alpha parameter as suggested by Semiatin and Lahoti and instability maps were constructed based on the stability parameter xi(epsilon) as suggested by Kalyankumar. Microstructural study was carried out on deformed specimens to validate the two criteria. The results of the two criteria were compared. The particular case of highly negative alpha values has been discussed in detail and it is shown that these correspond to regions of unstable flow.

Item Type: Journal Article
Publication: Materials Science and Technology
Publisher: Institute of Materials, Minerals and Mining
Additional Information: Copyright of this article belongs to Institute of Materials, Minerals and Mining.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 22 Jun 2011 06:31
Last Modified: 22 Jun 2011 06:31
URI: http://eprints.iisc.ac.in/id/eprint/38559

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