Investigation of thermomechanical characteristics of shape-memory alloys of the Ti-Ni-Nb system and of the effect of heat treatment on them

Попов, Н. Н.; Lar’kin, V. F.; Presnyakov, D. V.; Аушев, А. А.; Сысоева, Т. И.; Костылева, А. А.; Suvorova, E. B.

doi:10.1134/s0031918x13040078

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…With the addition of Mo in TiNi alloys transformation temperature decreases and possesses good yield strength, fracture strength, and workability [41]. TiNiNb alloys have fiber-like texture, superelasticity, columnar structure large strain, and large corrosion resistance [42][43][44][45][46][47][48]. TiNiPd alloys have a two-way shape memory effect, dimensional stability, increased transformation temperature, low hysteresis, and Ti-rich precipitates [49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Ahmad

2023

JMNM

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Shape memory alloys (SMAs) are a type of smart material and have excellent engineering and medical applications. TiNi binary alloys possess remarkable shape recovery, mechanical properties, corrosion resistance, and excellent biocompatibility. By ternary elements addition just like Au, Pt, Pd, Hf, and Zr, increases transformation temperatures, leading to high-temperature shape memory alloys (more than 100°C) but other elements (Fe, Cu, Co, and Mo) form low-temperature shape memory alloys, (lower than 100°C). In the present work, it is reported that the effect of ternary element addition on microstructural properties, shape memory properties, mechanical properties, corrosion resistance, and biocompatibility of ternary shape memory alloys. Ag, Au, and Cu-based TiNi ternary alloys have excellent biocompatibility. The addition of ternary elements such as Ag and Nb increases corrosion resistance, Fe rises the hysteresis loop, Hf enhances thermal stability, and Mo raises workability.

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Section: Introductionmentioning

confidence: 99%

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Ahmad

2023

JMNM

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“…In the last years, SMA rings found noticeable interest for small scale interference couplings [8] and large-scale civil applications, in particular for seismic bracing [9] and damping devices [10][11][12][13]. Studies are being carried out to better investigate their thermomechanical behaviour by numerical [14][15][16][17] and experimental [18,19] analyses in order to extend their use in other engineering fields and to develop ad-hoc design/validation methods needed for specific applications.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, full coupling dismounting occurs at very low temperatures (around −150 • C), due to the extremely low martensite TTs. This is a common drawback of other ternary NiTi-X alloy systems, such as NiTiFe [18,19], because the lower the unclamping temperature the more complex and time consuming the dismounting operations, leading to an increase of the radiation exposure of the technical personnel. More recently, ferrous (Fe)-based SMAs are also being considered as promising candidates for bulk industrial applications, as they are far less expensive than NiTi systems and exhibit a smaller thermal hysteresis with slightly lower memory strains and recovery stresses [28].…”

Section: Introductionmentioning

confidence: 99%

NiTi shape memory alloy pipe couplers for ultra-high vacuum systems: development and implementation

Niccoli

Giovinco

Garion

et al. 2022

Smart Mater. Struct.

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Novel NiTi-based shape memory alloy (SMA) pipe couplers were designed and developed. They are suitable for room-temperature ultrahigh vacuum (UHV) systems and provide a quick and compact solution at reasonable cost. Their use is particularly interesting for restricted-access areas of particle accelerators as their installation/dismounting can be performed remotely by temperature variations. A NiTi SMA with suitable composition was selected. NiTi couplers with different diameters in the range 30 to 135 mm were manufactured and thermo-mechanically trained to exhibit a proper two-way shape memory behaviour which comply with the strict operative constraints for coupling applications in room temperature vacuum sectors. The connectors are easily implementable as they were designed to be compatible with commercially available flanges (DN16, DN25, DN100) used worldwide in vacuum systems. The effect of the SMA joint geometry on the thermo-mechanical response and vacuum performance was investigated by numerical studies and experimental analyses such as strain-gage, extensometer and leak-tightness tests performed under different operating conditions including static axial loads and multiple thermal cycles. It was demonstrated that NiTi-based connectors can be thermally mounted upon heating and can guarantee the leak tightness of the vacuum pipe within a suitable temperature window. The thermal dismounting was also verified by cooling the couplers down to subzero temperatures (lower than -40 °C). Possible use of these connections at European Organization for Nuclear Research (CERN) is foreseen in vacuum assemblies installed in high radioactive areas, like those nearby particle collision points and beam collimators. Thanks to their compactness, SMA couplers are also of great interest for connecting beam pipes with small aperture such as those studied for the electron-positron future circular collider (FCC-ee) and next-generation synchrotron light facilities.

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Effects of the regimes of heat treatment and of the magnitude and temperature of the inducing deformation on the characteristics of the shape-memory effect in the 43Ti-46Ni-9Nb-2Zr alloy

Попов

Сысоева

Shchedrina

et al. 2015

Phys. Metals Metallogr.

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Investigation of thermomechanical characteristics of shape-memory alloys of the Ti-Ni-Nb system and of the effect of heat treatment on them

Cited by 9 publications

References 1 publication

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

Effect of Ternary Element Addition on Properties of TiNi-Based Shape Memory Alloys for Engineering and Medical Applications

NiTi shape memory alloy pipe couplers for ultra-high vacuum systems: development and implementation

Effects of the regimes of heat treatment and of the magnitude and temperature of the inducing deformation on the characteristics of the shape-memory effect in the 43Ti-46Ni-9Nb-2Zr alloy

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