Shape memory behavior of high strength Ni54Ti46 alloys

Shape memory behavior of highly Ni-rich Ni54Ti46 alloys was studied after aging (550°C, 3h, furnace cooling). A sequence of phase transformations was observed and the shape memory behavior is found to be highly stress dependent. After aging, a transformation strain of 1% with low temperature hystere...

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Vydáno v:Materials science & engineering. A, Structural materials : properties, microstructure and processing Ročník 580; s. 66 - 70
Hlavní autoři: Karaca, H.E., Kaya, I., Tobe, H., Basaran, B., Nagasako, M., Kainuma, R., Chumlyakov, Y.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 15.09.2013
Témata:
High strength
Mechanical characterization
NiTi
R-phase transformation
Shape memory alloys
Shape memory alloys
R-phase transformation
Mechanical characterization
High strength
NiTi
ISSN:0921-5093, 1873-4936
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Shrnutí:Shape memory behavior of highly Ni-rich Ni54Ti46 alloys was studied after aging (550°C, 3h, furnace cooling). A sequence of phase transformations was observed and the shape memory behavior is found to be highly stress dependent. After aging, a transformation strain of 1% with low temperature hysteresis is observed under an ultra high stress level of 1500MPa in compression. Moreover, superelastic response with 3% total strain can be obtained even when high stress level of 1500MPa is applied.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2013.04.102