Effect of 3d transition metal additions on the phase constituent, mechanical properties, and shape memory effect of near–eutectoid Ti–4Au biomedical alloys

Chiu, Wan–Ting; Ishigaki, Takuya; Nohira, Naoki; Umise, Akira; Tahara, Masaki; Hosoda, Hideki

doi:10.1016/j.jallcom.2020.157599

Cited by 20 publications

(24 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in Section 3.1 , the specimen of the Ti–4Au–30Ta alloy, which could not be cold–rolled at RT, could be attributed to the embrittlement brought from the Ti 3 Au precipitates. Hence, the cold workability agreed well with the phase constituents observed by the X–ray diffraction patterns ( Figure 1 ) and the literatures [ 35 , 38 , 41 , 42 ]. More details of the Ti 3 Au precipitates concerning its microstructure are shown in Section 3.3 .…”

Section: Resultssupporting

confidence: 89%

“…On the other hand, the precipitates were high in Au ( Figure 2 d) and low in Ta ( Figure 2 e). Given that the Ti 3 Au phase was determined by the X–ray diffraction pattern of the Ti–4Au–30Ta alloy ( Figure 1 b) and the literature [ 35 , 38 , 41 , 42 ], it thus could be concluded that the precipitates in bright contrast could be corresponded to the Ti 3 Au phase. In addition, it was reported that the Ti 3 Au phase is a line compound [ 37 ]; therefore, the solubility of Ta was extremely low (i.e., dark contrast) to the Ti 3 Au intermetallic compound.…”

Section: Resultsmentioning

confidence: 80%

“…On the other hand, according to the literature, the intermetallic compound of Ti 3 Au, which is a brittle phase and is often found in the Ti–Au–based alloys [ 35 , 38 , 41 , 42 ], could deteriorate the cold workability of the specimens. Therefore, in Section 3.1 , the specimen of the Ti–4Au–30Ta alloy, which could not be cold–rolled at RT, could be attributed to the embrittlement brought from the Ti 3 Au precipitates.…”

Section: Resultsmentioning

confidence: 99%

“…Titanium sponges (Ti, purity = 98%), Gold plates (Au, purity > 99.9%), and Tantalum flakes (Ta, purity > 99.9%) were used as the starting materials for the preparations of the Ti–Au–Ta ingots. The purification of the Ti sponges could be found in our previous study [ 35 ]. Alloys with compositions of the Ti–4 at.% Au–20 at.% Ta and the Ti–4 at.% Au–30 at.% Ta in a total weight of eight grams were fabricated by conventional physical metallurgy techniques.…”

Section: Methodsmentioning

confidence: 99%

“…The solution–treated specimens were thus named as “ST” specimens. An illustration for the aforementioned thermomechanical processes in detail could be found in our previous articles [ 35 , 36 ].…”

Section: Methodsmentioning

confidence: 99%

See 4 more Smart Citations

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

et al. 2021

Self Cite

View full text Add to dashboard Cite

Owing to the world population aging, biomedical materials, such as shape memory alloys (SMAs) have attracted much attention. The biocompatible Ti–Au–Ta SMAs, which also possess high X–ray contrast for the applications like guidewire utilized in surgery, were studied in this work. The alloys were successfully prepared by physical metallurgy techniques and the phase constituents, microstructures, chemical compositions, shape memory effect (SME), and superelasticity (SE) of the Ti–Au–Ta SMAs were also examined. The functionalities, such as SME, were revealed by the introduction of the third element Ta; in addition, obvious improvements of the alloy performances of the ternary Ti–Au–Ta alloys were confirmed while compared with that of the binary Ti–Au alloy. The Ti3Au intermetallic compound was both found crystallographically and metallographically in the Ti–4 at.% Au–30 at.% Ta alloy. The strength of the alloy was promoted by the precipitates of the Ti3Au intermetallic compound. The effects of the Ti3Au precipitates on the mechanical properties, SME, and SE were also investigated in this work. Slight shape recovery was found in the Ti–4 at.% Au–20 at.% Ta alloy during unloading of an externally applied stress.

show abstract

Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Evaluations of Mechanical Properties and Functionalities of the Al- and Zr-Tailored Ti–5.5Mo Shape Memory Alloys for Biomedical Applications

Chiu,

Hayakawa,

Nohira

et al. 2024

Metall Mater Trans A

View full text Add to dashboard Cite

Due to the critical world population aging issue, biomaterials are important topics in the biomedical community. Among the biomedical materials, shape memory alloys (SMAs) are considered to be promising materials owing to their functionalities, such as shape memory effect (SME) and superelasticity (SE). Ti–Mo–Al-based alloys, which are biocompatible materials, are basic materials in the Ti-based SMAs due to the evaluation of the phase stability through the calculations of Mo and Al equivalents. This study, in addition, introduced Zr into the Ti–Mo–Al-based alloys for its highly biocompatibility and being a fine modifier to tune the phase stability. The mechanical (i.e., strength and elongation) and functional (i.e., SME and SE) properties have been investigated in this study to reveal the practicability of the biomedical applications for human usage. It was found that addition of Zr to the Ti–Mo alloy shows slight influence on the mechanical properties of the binary Ti–Mo alloy. With the addition of Al, that is, ternary Ti–Mo–Al alloys, two-stage yielding was found in the tensile examinations. Among all the alloys, the Ti–5.5Mo–4Al, the Ti–5.5Mo–4Al–6Zr, and the Ti–5.5Mo–8Al–6Zr (mol pct) alloys performed excellent shape recovery of about 100 pct in the bending and heating tests. Especially, the Ti–5.5Mo–4Al–6Zr and the Ti–5.5Mo–8Al–6Zr alloys further show high strength. Results in this study could be a guideline for the design of the fundamental Ti–Mo–Al-based SMAs.

show abstract

Influence of the precipitates on the shape memory effect and superelasticity of the near–eutectoid Ti–Au–Fe alloy towards biomaterial applications

et al. 2021

View full text Add to dashboard Cite

Effect of 3d transition metal additions on the phase constituent, mechanical properties, and shape memory effect of near–eutectoid Ti–4Au biomedical alloys

Cited by 20 publications

References 28 publications

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

Investigations of Effects of Intermetallic Compound on the Mechanical Properties and Shape Memory Effect of Ti–Au–Ta Biomaterials

Evaluations of Mechanical Properties and Functionalities of the Al- and Zr-Tailored Ti–5.5Mo Shape Memory Alloys for Biomedical Applications

Influence of the precipitates on the shape memory effect and superelasticity of the near–eutectoid Ti–Au–Fe alloy towards biomaterial applications

Contact Info

Product

Resources

About