Results 211 to 220 of about 4,151 (244)
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Simple device for measuring the two-way shape memory effect
Review of Scientific Instruments, 1984A simple device has been designed to measure continuously and reproducibly the amount of the shape recovery related to the two-way shape memory effect in specimens undergoing thermal cycling. Using this device, it is possible to follow the dimensional changes of the specimens, to record the exact temperatures where shape changes occur, and to evaluate ...
Z. Talmi, M. Ganor, J. Baram, J. Pelleg
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Two-way shape memory effect in a NiAl-Fe alloy
Scripta Materialia, 1996The dual phase ({beta} + {gamma}) NiAl-Fe shape memory alloys have recently been considered for their good ductility at room temperature. It was reported that the NiAl-Fe alloys quenched from high temperature show a shape recovery of 60%--80% or 90% after training, though they possess a dual phase microstructure, in which the {gamma}-phase can not ...
C.Y. Xie, L.W. Sen, T.Y. Hsu
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Buckling-controlled two-way shape memory effect in a ring-shaped bilayer
Acta Mechanica Sinica, 2019Shape memory polymers (SMPs) usually have a one-way shape memory effect. In this paper, an easy-operating method to realize a two-way shape memory effect was demonstrated in a ring-shaped bilayer structure where the two layers are SMPs with different thermal transition temperatures.
Hao Li, Xiaoyan Liang, Weibin Song
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Volume 1: Development and Characterization of Multifunctional Materials; Mechanics and Behavior of Active Materials; Modeling, Simulation and Control of Adaptive Systems, 2015
Phenomenological model on thermo-mechanical response of shape memory alloy (SMA) strip is presented in this paper. Thermal response and transformation accompanied deformation are described by the proposed model. Newly transformation expansion tensor is defined to describe the relationship between the transformation-induced deformation of the strip and ...
Lin Hao, Jinhao Qiu, Hongli Ji, Rui Nie
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Phenomenological model on thermo-mechanical response of shape memory alloy (SMA) strip is presented in this paper. Thermal response and transformation accompanied deformation are described by the proposed model. Newly transformation expansion tensor is defined to describe the relationship between the transformation-induced deformation of the strip and ...
Lin Hao, Jinhao Qiu, Hongli Ji, Rui Nie
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Effect of hydrogen on the two-way shape memory effect in TiNi single crystals
Materials Today: Proceedings, 2017Abstract [ 1 ¯ 12 ]-oriented single crystals of Ti-51.3Ni (at. %) alloy, aged at 823 K for 1.5 h under a tensile stress of 150 MPa, have been investigated regarding the two-way shape memory effect (TWSME) in a hydrogen-free state and after hydrogenation.
Irina Kireeva +2 more
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Materials Letters, 2003
Abstract In this article, the effect of thermomechanical training temperature on the two-way shape memory effect (TWSME) of TiNiCu and TiNi alloys springs were investigated. The results showed that when the springs were thermomechanical-trained at pure martensite, there is an increase of the recovery rate to a saturated value, the maximum recovery ...
Z.G. Wang +4 more
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Abstract In this article, the effect of thermomechanical training temperature on the two-way shape memory effect (TWSME) of TiNiCu and TiNi alloys springs were investigated. The results showed that when the springs were thermomechanical-trained at pure martensite, there is an increase of the recovery rate to a saturated value, the maximum recovery ...
Z.G. Wang +4 more
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Two-way Antagonistic Shape Actuation Based on the One-way Shape Memory Effect
Journal of Intelligent Material Systems and Structures, 2008The stress created by the austenite transformation of mechanically constrained NiTi shape memory alloys (SMAs) significantly exceeds that required to deform (detwin) its low temperature martensitic phase. The one-way shape memory effect can therefore be used to create antagonistic, fully reversible flexural shape morphing structures by assembling ...
A.Y.N. Sofla, D.M. Elzey, H.N.G. Wadley
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Two-way shape memory effect developed by martensite deformation in NiTi
Acta Materialia, 1998Abstract The effect of tensile deformation in the martensitic state on the transformation behaviour of a polycrystalline near-equiatomic NiTi alloy was investigated by differential scanning calorimetry and thermal mechanical analysis. The experimental results indicated that the process of martensite reorientation proceeded in a Luders manner over a ...
Yinong Liu, Yong Liu, J Van Humbeeck
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The two way memory effect in copper-based shape memory alloys — thermodynamics and mechanisms
Acta Metallurgica et Materialia, 1992Abstract The mechanisms, which are according to literature underlying the two way memory effect (abbr. to TWME), made it widely accepted that the TWME is an unstable effect, i.e. it cannot do work during the forward martensitic transformation, and that it is, moreover, a small effect compared to the one way memory effect. Those and other hypothetical
R. Stalmans, J. Van Humbeeck, L. Delaey
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Two-Way Shape Memory Effect in NiTi
Materials Science Forum, 1990Yinong Liu, Paul G. McCormick
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