Results 191 to 200 of about 16,616 (239)

Chinese NiTi wire—A new orthodontic alloy

American Journal of Orthodontics, 1985
Chinese NiTi wire was studied by means of a bending test to determine wire stiffness, springback, and maximum bending moments. Chinese NiTi wire has an unusual deactivation curve (unlike steel and nitinol wires) in which relatively constant forces are produced over a long range of action. The characteristic flexural stiffness of NiTi wire is determined
C J, Burstone, B, Qin, J Y, Morton
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NiTi Alloys in Orthodontics

2000
In orthodontics, we are moving teeth within the bone in order to bring the teeth into a good functional position and alignment. Therefore, we are using a fixed appliance technique. In orthodontic-fixed appliance therapy, the physical properties of the materials play an important role in the application of force to the teeth. To move teeth, we are using
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R-phase transformation in NiTi alloys

Materials Science and Technology, 2014
In near equiatomic NiTi alloys, the thermoelastic transformation between austenite and the R-phase shows unique properties, which make the R-phase transformation very promising for applications. In the present paper, the fundamental issues related to the R-phase transformation, especially the effects of different thermomechanical treatments, are ...
X. B. Wang, B. Verlinden, J. Van Humbeeck   +2 more
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Superelastic NiTi-alloys under torsional loading

Journal de Physique IV (Proceedings), 2003
The paper presents experimental results on the mechanical behaviour of superelastic NiTi-shafts under torsional cyclic loading. Subject of the studies was to investigate the influence of heat treatment, load amplitude and number of cycles on the fatigue and damping properties.
W. Predki, M. Klönne
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Cavitation erosion of two NiTi alloys

Wear, 1992
Abstract Two near-equiatomic NiTi alloys, one B2 (parent) phase and one martensitic (product) phase, were tested for resistance to cavitation erosion. Although both compositions show very low mass-loss rates, the parent-phase alloy is clearly superior.
R.H. Richman, A.S. Rao, D.E. Hodgson
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Intergranular strains in transforming NiTi alloys

IEEE Transactions on Nuclear Science, 2005
Shape memory alloys (SMAs) exhibit unique thermomechanical properties due to a reversible martensitic phase transformation. Their current high cost and the insufficient predictability of the thermomechanical responses of these materials hinders further growth in their application.
G.M. Swallowe, P. Sittner, M.R. Daymond
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Shock compaction of NiTi alloy powder

Journal of Materials Science, 1987
The shock recovery experiment for the equiatomic NiTi alloy powder was performed by the flyer impact technique. The powder samples with the initial density of 70% of full density were shock-treated in the dyer velocity range 0.65 to 1.7 km sec−1. At the optimum flyer velocity of 1.3 km sec−1, the powder sample is compacted up to 99.5% of the full ...
Hitoshi Matsumoto, Ken-Ichi Kondo, Shoso Dohi, Akira Sawaoka   +3 more
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Functionally graded NiTi shape memory alloys

Ciência & Tecnologia dos Materiais, 2017
Abstract In this study, in order to obtain a functionally graded material, NiTi strips were annealed at 350 °C, 450 °C and 550 °C in a furnace using an assembly that allowed a temperature gradient along them, and their transformation temperatures were studied by Differential Scanning Calorimetry (DSC).
F.E. Ferreira, A.R. Alves, J.P. Oliveira, F.M. Braz Fernandes   +3 more
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FMR of NiTi alloy single crystals

Journal of Magnetism and Magnetic Materials, 1980
Abstract Single crystal samples of NiTi alloys have been examined by FMR. The results are similar to those already reported for NiV in that the g value is temperature dependent and the linewidth is a function of crystal orientation but in the latter case notable differences are observed.
M. Heath, S. Tither
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Microstructure of As-cast NiTi alloy

Materials Characterization, 1991
Abstract The metallography of as-cast NiTi alloy, of presumably pseudoelastic composition, is described. Characteristic morphologies, obtained in NiTi microstructure, were produced by different solidification conditions. A method is suggested to avoid the formation of primary hard phases during solidification.
M. Thier, M. Hühner, E. Kobus, D. Drescher, C. Bourauel   +4 more
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