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Phase Stability and Mechanical Properties of Ti-Cr Based Alloys with Low Young’s Modulus

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Abstract:

This work investigates the mechanical properties of Ti-Cr system alloys and focuses on the microstructure, the Young’s modulus, the deformation mechanism and the deformation behaviour observed in various alloy compositions. The addition of Al to the Ti-Cr system alloys greatly decreases the Young’s modulus. Addition of Al, Sn and Zr to various Ti-Cr alloys suppresses the athermal ω phase that forms during quenching from β field. A Ti-Cr system alloy with low Young’s modulus was obtained in suitable compositional combination of Cr, Zr and Sn or Al. The alloys with the composition where the quenched microstructure transits from martensite to meta-stable β phase show low Young’s modulus. In addition, the alloys show two-step yielding due to stress-induced transformation.

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Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

2114-2117

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.2114

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Online since:

June 2010

Authors:

Yonosuke Murayama, Shuichi Sasaki, Hisamichi Kimura, Akihiko Chiba

Keywords:

Martensite, Mechanical Property, Meta-Stable β Titanium, Young's Modulus, Ω Phase

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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