Manufacturing, Structure Control, and Functional Testing of Ti–Nb-Based SMA for Medical Application

Прокошкин, С. Д.; Braïlovski, Vladimir; Dubinskiy, S.; Zhukova, Yulia; Sheremetyev, V.; Konopatsky, Anton S.; Inaekyan, К.

doi:10.1007/s40830-016-0059-y

Cited by 36 publications

(17 citation statements)

References 46 publications

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“…At this point niobium has completely stabilized the bcc phase as can be see by the lattice parameters where c = b = a √ 2. The shape-memory effect (SME) is known to exist in binary Ti-Nb alloys 87,88 , gum metals 3,6 and other tita- nium and Ti-Nb alloys 17,86,89 . The SME is characterized by a recovery of initial geometric shape after deformation at a low temperature and subsequent heating.…”

Section: Martensitic Transformationsmentioning

confidence: 99%

“…Niobium is commonly used as the major β-stabilizer in gum metals, and Ti-Nb alloys on their own show promise in biomedical [15][16][17] and orthodontic 18 applications, and are used as superconducting wires for electromagnets in MRI machines, synchrotrons and tokamaks. In the present work we develop a classical interatomic potential for Ti-Nb alloys with focus on properties of the gum metal approximant Ti 3 Nb.…”

Section: Introductionmentioning

confidence: 99%

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Force-matched empirical potential for martensitic transitions and plastic deformation in Ti-Nb alloys

Ehemann

Wilkins

2017

Phys. Rev. B

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A force-matched spline-based empirical potential based on the modified embedded-atom method is fit to an extensive database of highly-converged density functional theory calculations for titaniumniobium alloys with an evolutionary algorithm. Consistency with experiment and existing models is verified through calculations of structural, elastic and thermal properties. The potential is used to study the effects of alloying on elastic properties, the martensite phase of Ti-rich alloys and the α-β and β-ω transformations. Stress-and temperature-induced martensitic transitions are demonstrated in Ti-25 at.%Nb by NPT simulation. Last, the effect of alloying on screw dislocations in hcp-Ti and bcc-Nb is analyzed at 5 at.% solute content with the fitted potential.

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Section: Martensitic Transformationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Force-matched empirical potential for martensitic transitions and plastic deformation in Ti-Nb alloys

Ehemann

Wilkins

2017

Phys. Rev. B

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“…During the past decades, SMAs have been extensively investigated in terms of fundamental mechanism and engineering applications, for instance the most commercial SMAs, NiTi alloys, show excellent SME and mechanical properties [3,4]. SMAs have been used in numerous fields, such as microelectromechanical systems (MEMS) [5,6], medicine [7,8], automotive [9], and aerospace [10]. However, conventional SMAs can suffer from oxidation and instability, especially in nanoscale [11,12], e.g., Ti content in NiTi unavoidably leads to changes in surface and interfacial layers due to oxidation, thereby reducing transforming performance [13].…”

Section: Introductionmentioning

confidence: 99%

Recent Developments in Small-Scale Shape Memory Oxides

Wang

Ludwig

2020

Shap. Mem. Superelasticity

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This review presents an overview of the developments in small-scale shape memory materials: from alloys to oxides and ceramics. Shape memory oxides such as zirconia, different ferroelectric perovskites and VO2-based materials have favorable characteristics of high strength, high operating temperature and chemical resistance, which make this class of shape memory materials interesting for special applications, e.g., in harsh environments or at the nanoscale. Because of the constraint and mismatch stress from neighboring grains in polycrystalline/bulk oxides, the transformation strain of shape memory oxides is relatively small, and micro-cracks can appear after some cycles. However, recent progress in shape memory oxide research related to small-scale approaches such as decreasing the amounts of grain boundaries, strain-engineering, and application in the form of nanoscale thin films shows that some oxides are capable to exhibit excellent shape memory effects and superelasticity at nano/micro-scales. The materials systems ZrO2, BiFO3, and VO2 are discussed with respect to their shape memory performance in bulk and small-scale.

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“…Nb also increase the resistance of Ti to oxidation and contributes to decrease of oxygen solubility and further oxygen diffusion into the alloy (Han et al, 2015). These properties make Ti-Nb alloys faithful and possible candidate biomedical materials for replacing frequently used commercial Ti6Al4V and TiNi alloys (Kim et al, 2006;Wang and Zheng 2009;McMahon et al, 2012;Kent et al, 2013;Andrade et al, 2015;Bönisch et al, 2015;Prokoshkin et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Ti-Nb alloys are generally produced by casting techniques (Hon et al, 2003;Ozaki et al, 2004;Kim et al, 2006;Chai et al, 2008;Chai et al, 2009;Ma et al, 2010;Cremasco et al, 2013;Han et al, 2015;Bönisch et al, 2015;Prokoshkin et al, 2016). Porosity, rough microstructure, and composition segregation are the main defects normally present by casting and greatly worsen the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Sıcak Presleme Ve Yüksek Sıcaklık Sinterleme Kombinasyonu İle Β Tipi Biyomedikal Ti74Nb26 Alaşımının Üretimi

Aydoğmuş

Al-Zangana

Kelen

2020

Konya Journal of Engineering Sciences

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Titanium (Ti)-Niobium (Nb) alloys are generally produced by casting methods. Since the melting temperatures of pure Ti and Nb are quite high, their fabrication by casting techniques is costly. On the other hand, it is possible to produce these alloys economically at much lower temperatures (less than melting temperature of Ti), completely in solid state using powder metallurgy. In the present study, Ti74Nb26 alloys were produced using pure Ti and pure Nb powders by combination of hot pressing and high temperature sintering for the first time. The influences of processing temperature and time on density, microstructure, and mechanical behavior were investigated. Density measurements showed that hot pressing at 800 °C provided full density. XRD and SEM investigations revealed that amount of β phase formed increased with increasing sintering time. In addition to main phase β, little amount of α phase and a very small amount of pure Nb were observed in the microstructure. Mechanical properties were measured by means of uniaxial compression and micro Vickers indentation tests. The results indicated that 4 h of sintering at 1200 °C exhibited the highest value of hardness (336 HV), elastic modulus (44 GPa), yield strength (894 MPa), and compressive strength (1178 MPa).

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Manufacturing, Structure Control, and Functional Testing of Ti–Nb-Based SMA for Medical Application

Cited by 36 publications

References 46 publications

Force-matched empirical potential for martensitic transitions and plastic deformation in Ti-Nb alloys

Force-matched empirical potential for martensitic transitions and plastic deformation in Ti-Nb alloys

Recent Developments in Small-Scale Shape Memory Oxides

Sıcak Presleme Ve Yüksek Sıcaklık Sinterleme Kombinasyonu İle Β Tipi Biyomedikal Ti74Nb26 Alaşımının Üretimi

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