Effect of Annealing Temperature on Microstructure and Superelastic Properties of Ti-Au-Cr-Zr Alloy

Shinohara, Yoshikazu; Tahara, Masaki; Inamura, Tomonari; Miyazaki, S.; Hosoda, Hideki

doi:10.2320/matertrans.m2014439

Cited by 20 publications

(6 citation statements)

References 40 publications

(50 reference statements)

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“…In the case of stent grafts of Ti–Ni, severe pitting and crevice corrosion appears by the acceleration of corrosion due to the crevice between Ti–Ni alloy and a polymer as an artificial blood vessel (Heintz et al, 2001). Therefore, Ni-free Ti-based superelastic alloys have been researched (Shinohara et al, 2015).…”

Section: Medical Application and Tasks Of Titaniummentioning

confidence: 99%

Titanium–Tissue Interface Reaction and Its Control With Surface Treatment

Hanawa

2019

Front. Bioeng. Biotechnol.

209

149

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Titanium (Ti) and its alloys are widely used for medical and dental implant devices—artificial joints, bone fixators, spinal fixators, dental implant, etc. —because they show excellent corrosion resistance and good hard-tissue compatibility (bone formation and bone bonding ability). Osseointegration is the first requirement of the interface structure between titanium and bone tissue. This concept of osseointegration was immediately spread to dental-materials researchers worldwide to show the advantages of titanium as an implant material compared with other metals. Since the concept of osseointegration was developed, the cause of osseointegration has been actively investigated. The surface chemical state, adsorption characteristics of protein, and bone tissue formation process have also been evaluated. To accelerate osseointegration, roughened and porous surfaces are effective. HA and TiO 2 coatings prepared by plasma spray and an electrochemical technique, as well as alkalinization of the surface, are also effective to improve hard-tissue compatibility. Various immobilization techniques for biofunctional molecules have been developed for bone formation and prevention of platelet and bacteria adhesion. These techniques make it possible to apply Ti to a scaffold of tissue engineering. The elucidation of the mechanism of the excellent biocompatibility of Ti can provide a shorter way to develop optimal surfaces. This review should enhance the understanding of the properties and biocompatibility of Ti and highlight the significance of surface treatment.

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Section: Medical Application and Tasks Of Titaniummentioning

confidence: 99%

Titanium–Tissue Interface Reaction and Its Control With Surface Treatment

Hanawa

2019

Front. Bioeng. Biotechnol.

209

149

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“…58) In addition, the effects of annealing temperature on the texture formation of the Ti-4Au-5Cr-8Zr alloy was also conducted. 61) In this study, the Ti 3 Au compound was formed when the annealing temperatures were at 973 and 1 073 K, while no Ti 3 Au compound could be found when the annealing temperature was elevated to 1 173 K. It was discerned that the as-rolled specimen and the 973 K annealing-treated alloy performed the {112} β < 110 > β rolling texture, while the 1 073 and 1 173 K annealing-treated alloy displays the {001} β < 110 > β recrystallization texture. Furthermore, the effect of the Ti 3 Au precipitates on the deformation behavior of the superelasticity of the Ti-4Au-5Cr-8Zr alloy was also investigated, 62) where the alloys were annealed at 1 073 and 1 173 K, respectively.…”

Section: Ti-au-cr-related Quaternary Alloy Systemsmentioning

confidence: 99%

“…Basically, in the aforementioned three literature of the Ti-Au-Cr-Zr alloy system, [60][61][62] Zr element, which was in the IVB group as Ti element, was utilized for the replacement of Ti to reduce its M s . Besides to the aforementioned Ti-4Au-5Cr-8Zr alloy, the Ti-Au-Cr-Cu alloys were also investigated.…”

Section: Ti-au-cr-related Quaternary Alloy Systemsmentioning

confidence: 99%

A Review of Investigations on Microstructure and Mechanical Properties of the Present Achievements of the Ti-Au-based Shape Memory Alloys

2023

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Owing to the worldwide growth of aging population, the biomedical materials, such as implantation materials, are greatly demanded in these decades. Shape memory alloys (SMAs) and superelastic (SE) alloys, whose shape deformation could be manipulated by controlling the stress and temperature applied, are considered as promising materials to practice the biomedical applications. In this article, the β-Titanium (β-Ti) alloys were chosen for their high biocompatibility and appropriate shape deformation behaviors. First, Gold (Au) element was chosen as the tailoring element to functionalize the β-Ti alloys for its high X-ray contrast, which is a crucial prerequisite for the biomedical materials. Second, to impose the phase transformation temperature to be around the human body temperature, various transition metals were examined and introduced into the Ti-Au-based alloys. Based on the screening results of the transition metals, chromium (Cr) was determined to be the addition element. To further enhance the X-ray contrast and biocompatibility as well as conduct the fine-tune of phase stability of the Ti-Au-Cr-based alloys, Tantalum (Ta), which possesses high X-ray contrast and excellent biocompatibility, was served as the fourth element in this system and its addition concentration was optimized. Besides to the selection of the elements, the annealing temperature and annealing time length were both investigated to optimize the transformation temperature, phase stability, and microstructures. It was found that the Ti-4Au-5Cr-5Ta alloy, which was annealed at 1 073 K for 1.8 and 3.6 ks performed a room temperature superelasticity, showed almost 100% shape recovery upon unloading.

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“…Ti-Mo-Al-Zr [51] [52], Ti-Zr-Nb-Sn [53], Ti-Au-Cr-Zr [54], Ti-Mo-Sn-Zr [55], Ti-Nb-Cu [56] are being further studied.…”

Section: Shape Memory Alloysmentioning

confidence: 99%