Processing of an α-2 aluminide alloy, Ti---24Al---11Nb

Sagar, PK and Banerjee, D and Prasad, YVRK (1994) Processing of an α-2 aluminide alloy, Ti---24Al---11Nb. In: Materials Science and Engineering A, 177 (1-2). pp. 185-197.

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Abstract

Compressive stress-strain curves have been generated over a range of temperatures (900-1100-degrees-C and strain rates (0.001-100 s-1) for two starting structures consisting of lath alpha2 and equiaxed alpha2 in a Ti-24Al-11Nb alloy. The data from these tests have been analysed in terms of a dynamic model for processing. The results define domains of strain rate and temperature in which dynamic recrystallization of alpha2 occurs for both starting structures. The rate controlling process for dynamic recrystallization is suggested to be cross-slip in the alpha2 phase. A region of processing instability has also been defined within which shear bands form in the lath structure. Recrystallization of the beta phase is shown to occur for different combinations of strain rate and temperature from those in which the alpha2 phase recrystallizes dynamically

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier science
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	18 Apr 2011 05:33
Last Modified:	18 Apr 2011 05:33
URI:	http://eprints.iisc.ac.in/id/eprint/36707

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