Superelastic behavior of in-situ eutectic-reaction manufactured high strength 3D porous NiTi-Nb scaffold

Liu, Shifeng; Liu, Jingbo; Wang, Liqiang; Lok-Wang, Robin; Zhong, Yinsheng; Lü, Weijie; Zhang, Lai-Chang

doi:10.1016/j.scriptamat.2020.02.025

Cited by 61 publications

(19 citation statements)

References 55 publications

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“…Extending the aging time results in the formation of the Ni 3 Ti 2 phase with a simultaneous dissolution of the Ni 4 Ti 3 particles, followed by the precipitation of the equilibrium Ni 3 Ti phase particles. Consequently, the decomposition of the B2 parent phase influences the shape memory and the superelasticity effect [1,10,11,39,40]. One of the interesting methods for modifying the surface seems to be electrophoretic deposition (EPD) [41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

2020

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The surface modification of NiTi shape memory alloys is a method for increasing their multi-functionalities. In our solution, hydroxyapatite powder was mixed with a chemically synthesized silicon dioxide/silver (nSiO2/Ag) nanocomposite in a different weight ratio between components (1:1, 5:1, and 10:1) and then electrophoretically deposited on the surface of the NiTi alloy, under various time and voltage conditions. Subsequently, uniform layers were subjected to heat treatment at 700 °C for 2 h in an argon atmosphere to improve the strength of their adhesion to the NiTi substrate. A change in linear dimensions of the co-deposited materials during the sintering process was also analyzed. After the heat treatment, XRD, Raman, and Scanning Electron Microscopy (SEM) + Energy Dispersive Spectrometer (EDS) studies revealed the formation of completely new composite coatings, which consisted of rutile and TiO2-SiO2 glass with silver oxide and HAp particles that were embedded into such coatings. It was found that spalling characterized the 1:1 ratio coating, while the others were crack-free, well-adhered, and capable of deformation to 3.5%. Coatings with a higher concentration of nanocomposite were rougher. Electrochemical impedance spectroscopy (EIS) tests in Ringer’s solution revealed the capacitive behavior of the material with high corrosion resistance. The kinetics and susceptibility to pitting corrosion was the highest for the NiTi electrode that was coated with a 5:1 ratio HAp/nSiO2/Ag hybrid coating.

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Section: Introductionmentioning

confidence: 99%

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

2020

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“…The (α + β)-class Ti alloys showed an excellent combination of strength/ductility and corrosion resistance properties in comparison with α and β classes [8,9]. The Ti-based shape-memory alloys, especially those belonging to Ti-Ni system, possess an interesting combination of strength, superalesticity and shape memory effects, properties which are largely influenced by the alloying elements [10].…”

Section: Introductionmentioning

confidence: 99%

“…In the case of (α + β)-class alloys the exhibited mechanical behaviour can be stirred towards increased strength or ductility by manipulating the weight-fraction balance between the α -Ti/β-Ti phases. If the weight-fraction of α-Ti phase is increased than the exhibited mechanical properties are directed towards increased strength [10,11]. If the weight-fraction of β-Ti phase is increased the exhibited mechanical properties are directed towards increased ductility [11,12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties Evolution during Solution and Ageing Treatment for a Hot Deformed, above β-transus, Ti-6246 Alloy

Alluaibi

Cojocaru

Rusea³

et al. 2020

Metals

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The present study investigates the influence of hot-deformation, above β-transus and different thermal treatments on the microstructural and mechanical behaviour of a commercially available Ti-6246 titanium-based alloy, by SEM (scanning electron microscopy), tensile and microhardness testing techniques. The as-received Ti-6246 alloy was hot-deformed—HR by rolling, at 1000 °C, with a total thickness reduction (total deformation degree) of 65%, in 4 rolling passes. After HR, different thermal (solution—ST and ageing—A) treatments were applied in order to induce changes in the alloy’s microstructure and mechanical behaviour. The applied solution treatments (ST) were performed at temperatures below and above β-transus (α → β transition temperature; approx. 935 °C), to 800 °C, 900 °C and 1000 °C respectively, while ageing treatment at a fixed temperature of 600 °C. The STs duration was fixed at 27 min while A duration at 6 h. Microstructural characteristics of all thermomechanical (TM) processed samples and obtained mechanical properties were analysed and correlated with the TM processing conditions. The microstructure analysis shows that the applied TM processing route influences the morphology of the alloy’s constituent phases. The initial AR microstructure shows typical Widmanstätten/basket-weave-type grains which, after HR, are heavily deformed along the rolling direction. The STs induced the regeneration of α-Ti and β-Ti phases, as thin alternate lamellae/plate-like structures, showing preferred spatial orientation. Also, the STs induced the formation of α′-Ti/α″-Ti martensite phases within parent α-Ti/β-Ti phases. The ageing treatment (A) induces reversion of α′-Ti/α″-Ti martensite phases in parent α-Ti/β-Ti phases. Mechanical behaviour showed that both strength and ductility properties are influenced, also, by applied TM processing route, optimum properties being obtained for a ST temperature of 900 °C followed by ageing (ST2 + A state), when both strength and ductility properties are at their maximum (σUTS = 1279 ± 15 MPa, σ0.2 = 1161 ± 14 MPa, εf = 10.1 ± 1.3%).

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“…Compared with other noble metals (Au, Ag), medical stainless steel (316L), magnesium alloys (Mg-4Y-3RE), and Co-Cr-Mo alloys (Co-28Cr-6Mo), Ti, and its alloys possess more outstanding comprehensive performances in the metallic implant material family (Rack and Qazi, 2006;Niinomi et al, 2012;Zhang and Chen, 2019;Liu et al, 2020). Both large application potential and commercial values exist in hard tissue reconstruction and replacement due to their attractive characteristics, including low modulus, excellent mechanical properties, as well as superior biofunctions and biocompatibility (Niinomi, 2002;Geetha et al, 2009;Niinomi and Nakai, 2011;Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Cold Rolling Deformation Characteristic of a Biomedical Beta Type Ti–25Nb–3Zr–2Sn–3Mo Alloy Plate and Its Influence on α Precipitated Phases and Room Temperature Mechanical Properties During Aging Treatment

Cheng

et al. 2020

Front. Bioeng. Biotechnol.

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Superelastic behavior of in-situ eutectic-reaction manufactured high strength 3D porous NiTi-Nb scaffold

Cited by 61 publications

References 55 publications

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

Functionalization of the NiTi Shape Memory Alloy Surface by HAp/SiO2/Ag Hybrid Coatings Formed on SiO2-TiO2 Glass Interlayer

Microstructure and Mechanical Properties Evolution during Solution and Ageing Treatment for a Hot Deformed, above β-transus, Ti-6246 Alloy

Cold Rolling Deformation Characteristic of a Biomedical Beta Type Ti–25Nb–3Zr–2Sn–3Mo Alloy Plate and Its Influence on α Precipitated Phases and Room Temperature Mechanical Properties During Aging Treatment

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