On the potential of Ti sub(50Au) sub(5)0 compound as a high temperature shape memory alloy

High temperature shape memory alloys have received a large interest for many years but none of the systems studied so far has led to industrial applications yet. The titanium-gold system has been reported to develop a martensitic transformation at high temperature but the previous studies did not me...

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Published inIntermetallics Vol. 19; no. 10; pp. 1461 - 1465
Main Authors Declairieux, C, Denquin, A, Ochin, P, Portier, R, Vermaut, P
Format Journal Article
LanguageEnglish
Published 01.10.2011
Subjects
Compressing
Industrial applications
Martensitic transformations
Oxidation
Oxidation resistance
Shape memory alloys
Shape memory effect
Strain
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Summary:High temperature shape memory alloys have received a large interest for many years but none of the systems studied so far has led to industrial applications yet. The titanium-gold system has been reported to develop a martensitic transformation at high temperature but the previous studies did not mention about shape memory effect in a quantitative way. Here are presented first elements concerning the potential of this compound as a high temperature shape memory alloy, from the functional properties and oxidation resistance point of view. A maximum recovered compression strain of 3.9% can be obtained for an initial compression strain of 5% corresponding to a 78% shape recovery, in the range of temperature 850-950 K. A two-way shape memory effect is also reported for the first time for this compound. The oxidation of the alloy at these temperatures seems to be a limitation but its behavior around 700 K is very promising.
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ISSN:0966-9795
DOI:10.1016/j.intermet.2011.05.028