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Heat Treatment of Ti2AlNb Intermetallic and its Superplastic Properties

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Abstract:

Ti2AlNb orthorhombic alloys exhibit great potential as advanced aerospace and structural materials serviced at elevated temperature. In this paper, pre-heat treatment of as-received hot rolling Ti-22Al-25Nb alloy was conducted. Fine, stable and equiaxed grain structure was obtained by the pre-heat treatment. The volume fraction of B2 increased when annealing at 980°C. The Ti-22Al-25Nb alloy showed characteristics of superplastic deformation when tested at 960°C. Maximum elongation of 280% has been obtained at strain rate of 1.0×10-4s-1.

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Periodical:

Materials Science Forum (Volumes 551-552)

Pages:

453-456

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.551-552.453

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Online since:

July 2007

Authors:

He Ping Guo, Zhi Qiang Li

Keywords:

Orthorhombic alloy, Preheat Treatment, Superplastic Tension, Ti2AlNb

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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References

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DOI: 10.1542/peds.2014-2026d

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