Results 191 to 200 of about 16,535 (242)
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Surface oxidation of NiTi shape memory alloy
Biomaterials, 2002Mechanically polished NiTi alloy (50 at% Ni) was subjected to heat treatment in air in the temperature range 300-800 degrees C and characterised by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. Thermogravimetry measurements were carried out to investigate the kinetics of oxidation. The results
G S, Firstov +4 more
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Innovative materials: the NiTi alloys in orthodontics
Bio-Medical Materials and Engineering, 1996Since ten years the NiTi alloys have gained an ever increasing place in orthodontic practice: that is due to their peculiar mechanical properties ascribed to a martensitic thermoelastic transformation which can be thermally or, in a proper temperature range, stress-induced.
G, Airoldi, G, Riva
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The dynamic impact behavior of NiTi alloy
Materials Science and Engineering: A, 2005The contact force during impact of a NiTi alloy was studied in this paper. The contact force and contact time during impact between a spherical impactor and the specimen at different impact velocity and temperature were measured in real time. The maximum contact force and contact time of the NiTi alloy in the martensite state increased and decreased ...
Ren Bo Xu, Li Shan Cui, Yan Jun Zheng
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Chinese NiTi wire—A new orthodontic alloy
American Journal of Orthodontics, 1985Chinese 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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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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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, 2014In 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 +2 more
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Superelastic NiTi-alloys under torsional loading
Journal de Physique IV (Proceedings), 2003The 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, 1992Abstract 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, 2005Shape 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, 1987The 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 +3 more
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