Results 151 to 160 of about 928,583 (198)

Two-way shape memory effect in polymer laminates

Materials Letters, 2008
Novel polymer laminate exhibiting two-way shape memory effect has been prepared by layer technique with the shape memory polymer and elastic polymer. In this paper, we demonstrate the two-way shape memory behavior, i.e., bending on heating and reverse bending on cooling; describe the preparation procedure; and investigate its two-way shape memory ...
Shaojun Chen, Jinlian Hu, Haitao Zhuo, Yong Zhu   +3 more
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Understanding indentation-induced two-way shape memory effect

Journal of Materials Research, 2007
Spherical indents in NiTi shape memory alloys can have reversible depth change: deeper depth in the martensitic phase at low temperature and shallower depth in the austenitic phase at high temperature. This is the indentation-induced two-way shape memory effect.
Yijun Zhang, Yang-Tse Cheng, David S. Grummon   +2 more
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Two way shape memory effect in NiTiHf high temperature shape memory alloy tubes

Acta Materialia, 2019
Abstract Two-way shape memory effect (TWSME) in nano-precipitation hardened, Ni50.3Ti29.7Hf20 high temperature shape memory alloy (HTSMA) thin walled tubes and its thermal stability were investigated. Torsional TWSME was induced by repeated thermal cycling across their martensitic transformation under applied shear stress.
C. Hayrettin, O. Karakoc, I. Karaman, J.H. Mabe, R. Santamarta, J. Pons   +5 more
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On the mechanisms of two-way memory effect and stress-assisted two-way memory effect in NiTi shape memory alloy

Journal of Alloys and Compounds, 2008
This study aims at understanding the predominant mechanisms responsible for the maximum TWME and SATWME. It was found that partial reverse transformation initiated under constraint condition resulted in the generation of two-step phase transformations.
Kiyohide Wada, Yong Liu
openaire   +1 more source

Origin of two way shape memory effect in Cu-based shape memory alloys

Journal de Physique IV (Proceedings), 2003
Two-way shape memory effect (TWSME) should be trained by thermomechanical cycling or constrained aging. After constrained aging, oriented stress fields around precipitates and stabilized stress-induced martensite were found in Cu-Zn-Al alloys. The effect of these phases on TWSME has been studied by in-situ observations in TEM.
X. M. Zhang, J. Fernandez, J. M. Guilemany   +2 more
openaire   +1 more source

Indentation-induced two-way shape-memory effect in NiTi

The 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2013
The indentation-induced shape-memory behavior in both an aged and a solutionized austenitic nickel-titanium (NiTi) alloy was investigated by Vickers indentation. The depth recovery ratio of the indents as well as the formation of protrusions on the surface after planarization was analyzed after the sample was heated above and cooled below the phase ...
Nicolas J. Peter, Mareike Frensemeier, Enwei Qin, Carl P. Frick, Eduard Arzt, Andreas S. Schneider   +5 more
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Buckling-controlled two-way shape memory effect in a ring-shaped bilayer

Acta Mechanica Sinica, 2019
Shape 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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Origin of the two-way memory effect in NiTi shape memory alloys

Scripta Metallurgica et Materialia, 1993
It is now well-known that the two-way memory effect (TWME) of shape memory alloys is obtained after a thermomechanical cycling called training. Although this point is well-admitted, many controversies still subsist on the physical origin of this two-memory effect.
P.Y. Manach, D. Favier
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Structural morphing using two-way shape memory effect of SMA

International Journal of Solids and Structures, 2005
Abstract One-way shape memory effect (SME) is not suitable mechanism for application to the repeated actuation of an shape memory alloy (SMA) wire because the host structure does not return to its initial shape after it cools down. In the present study, the two-way SME under residual stress is considered.
Maenghyo Cho, Sanghaun Kim
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Simple device for measuring the two-way shape memory effect

Review of Scientific Instruments, 1984
A 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
openaire   +1 more source