Results 211 to 220 of about 103,048 (257)
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Scripta Materialia, 2011
A significant two-way shape memory effect (TWSME) was demonstrated, for the first time, in a TiNiPd high-temperature shape memory alloy (SMA) with TWSM strains as high as 2.6%. This TWSME was able to perform mechanical work, with a maximum work output of 0.12 J g−1, well above the levels obtained from conventional SMAs. Microstructural changes obtained
Ibrahim Karaman, R D Noebe, K C Atli
exaly +2 more sources
A significant two-way shape memory effect (TWSME) was demonstrated, for the first time, in a TiNiPd high-temperature shape memory alloy (SMA) with TWSM strains as high as 2.6%. This TWSME was able to perform mechanical work, with a maximum work output of 0.12 J g−1, well above the levels obtained from conventional SMAs. Microstructural changes obtained
Ibrahim Karaman, R D Noebe, K C Atli
exaly +2 more sources
Modelling of the two-way shape memory effect
Philosophical Magazine A, 1992After detailed analyses ofthe microstructural mechanism and training methods ofthe two-way shape memory effect, a further refinement of the transformation kinetic expressions for shape memory alloys (SMAs) is derived. A one-dimensional thermomechanical constitutive model for the two-way effect which undergoes thermoelastic martensitic transformation ...
X. D. Zhang, C. A. Rogers, C. Liang
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Two-way shape memory effect in Ni49Fe18Ga27Co6 ferromagnetic shape memory single crystals
Materials Science and Engineering: A, 2021Abstract The two-way shape memory effect (TWSME) induced in Ni49Fe18Ga27Co6 (at%) ferromagnetic shape memory single crystals is investigated in the present work. A short superelastic cycling in compression along the [001] direction at increasing temperatures up to 453 K, with a total of 18 cycles is enough to induce fully reversible TWSME with ...
F. Masdeu +3 more
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Two-Way Memory Effect in NiTi Shape Memory Alloys
Advances in Science and Technology, 2008In general, the development mechanisms of TWME have long been understood as the nucleation and growth of preferentially oriented martensite guided by the internal stress. This work extends the study by investigating the effects of martensite deformation, constrained stress and retained martensite via partial reverse transformation through thermal ...
Kiyohide Wada, Yong Liu
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Indentation-induced two-way shape-memory effect in NiTi
The 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2013The 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 Peter +5 more
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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
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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
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International Journal of Plasticity, 2000
Abstract The paper presents a macroscopic description for the simulation of the two way shape memory effect (TWSME) of shape memory alloys (SMA), and is an extension of a previous work dealing with the global thermomechanical behavior of SMA. The model is set in the framework of the thermodynamics of irreversible processes. Two internal variables are
Lexcellent, Christian +3 more
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Abstract The paper presents a macroscopic description for the simulation of the two way shape memory effect (TWSME) of shape memory alloys (SMA), and is an extension of a previous work dealing with the global thermomechanical behavior of SMA. The model is set in the framework of the thermodynamics of irreversible processes. Two internal variables are
Lexcellent, Christian +3 more
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Two-way shape memory effect in polymer laminates
Materials Letters, 2008Novel 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 +3 more
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Origin of two way shape memory effect in Cu-based shape memory alloys
Journal de Physique IV (Proceedings), 2003Two-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 +2 more
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Origin of the two-way memory effect in NiTi shape memory alloys
Scripta Metallurgica et Materialia, 1993It 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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