Journal ArticleDOI
The mechanical properties of NiTi-based shape memory alloys
K.N. Melton,O. Mercier +1 more
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TLDR
In this paper, a detailed study of the mechanical properties of NiTi-based alloys is made, and a toughness minimum is observed in a certain temperature range and it is argued that this is a consequence of an interaction between deformation by stress-induced martensite and conventional plastic flow when these mechanisms operate simultaneously.About:
This article is published in Acta Metallurgica.The article was published on 1981-02-01. It has received 166 citations till now. The article focuses on the topics: Charpy impact test & Shape-memory alloy.read more
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High elongation linear elastic guidewire
TL;DR: The Ni-Ti linear elastic alloy was used in the construction of the guidewire (10) as discussed by the authors, which exhibits a stress-strain curve with a linear stressstrain relationship and a yield point, and is deformable beyond the yield point to a desired set shape.
Journal ArticleDOI
New modelling of the B2 phase and its associated martensitic transformation in the Ti-Ni system
TL;DR: In this paper, a symmetric two-sublattice model (Ni, Ti, Va)0.5 is applied to describe the intermediate B2 compound in order to cope with the order-disorder transition in the Ti-Ni system.
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Thermodynamic study of the low-temperature phase B19′ and the martensitic transformation in near-equiatomic Ti-Ni shape memory alloys
TL;DR: In this paper, experimental information on the transformation temperatures and the thermodynamic properties of the near-equiatomic TiNi alloys is analyzed, and the estimation of T0 temperature from experimental Ms and Af temperatures is paid to the estimation.
Journal ArticleDOI
Biomechanically Inspired Shape Memory Effect Machines Driven by Muscle like Acting NiTi Alloys
Raffaella Aversa,Francesco Tamburrino,Relly Victoria Petrescu,Florian Ion Petrescu,Mateus Artur,Guanying Chen,Antonio Apicella +6 more
TL;DR: In this article, a bioinspired approach to design of systems based on Shape Memory Alloys (SMAs), a class of Smart Materials that has in common with muscles the capability to react to an impulse (thermal for SMAs) with a contraction.
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Differential scanning calorimetry (DSC) analyses of superelastic and nonsuperelastic nickel-titanium orthodontic wires
TL;DR: The DSC results indicate that the transformation processes are broadly similar in superelastic, body-temperature shape-memory, and nonsuperelastic NiTi wires.
References
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Journal ArticleDOI
Criterion for the action of applied stress in the martensitic transformation
J.R. Patel,Morris Cohen +1 more
TL;DR: In this article, the martensitic reaction is treated as a strain transformation with shear and dilatational displacements, respectively parallel and normal to the habit plane, and the resulting effect on the temperature is calculated from the mechanical work done on or by the transforming region as the resolved shear, and normal components of the applied stress are carried through the corresponding transformation strains.
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A summary of recent research on the nitinol alloys and their potential application in ocean engineering
TL;DR: In other alloying variations some of the nickel is replaced with cobalt, in the formula TiNixCo1−x, is an effective substitution element for lowering the transition temperature as discussed by the authors.
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On the thermodynamics of thermoelastic martensitic transformations
R.J. Salzbrenner,Morris Cohen +1 more
TL;DR: In this paper, both elastic strain energy due to the transformational shape change and frictional resistance opposing interfacial motion are shown to contribute significantly to the observed thermodynamic changes which accompany thermoelastic martensitic transformations in Cu-14 Al-2.5 Ni alloys.
Journal ArticleDOI
Crystal Structure and a Unique ``Martensitic'' Transition of TiNi
TL;DR: In this paper, the crystal structure of TiNi has been determined in the temperature range −70° to 900°C through single-crystal x-ray diffraction methods, and it has been shown that the 9A superlattice undergoes a ''martensitic'' pseudo order-disorder transition which is not accompanied by a crystallographic transformation.