Improved Mechanical Properties of Ti2AlNb-Based Intermetallic Alloys and Composites

Abstract:

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Mechanical properties of a Ti2AlNb-based intermetallic alloy both at room and elevated temperatures were considerably improved due to formation of a homogeneous microstructure with the average grain size of about 300 nm. At room temperature, elongations up to 25% were obtained and the ultimate strength reached 1400 MPa. The alloy exhibited superplastic behavior in the temperature range of 850-1000°C. The maximum elongation of 930% and steady state flow stress 50 of about 125 MPa were obtained at 900°C and strain rate of 4.210-3 s-1. The nanostructured material was used for production of intermetallic sheets and multilayer composite plates consisting of alternating layers of orthorhombic intermetallic and commercial high temperature titanium alloy. Ti2AlNb-based sheets and composites exhibited improved mechanical properties.

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Periodical:

Edited by:

Ch. Linsmeier and M. Reinelt

Pages:

105-108

DOI:

10.4028/www.scientific.net/AMR.59.105

Citation:

M.R. Shagiev et al., "Improved Mechanical Properties of Ti2AlNb-Based Intermetallic Alloys and Composites", Advanced Materials Research, Vol. 59, pp. 105-108, 2009

Online since:

December 2008

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$35.00

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