Shape memory behavior of Ti–Ta and its potential as a high-temperature shape memory alloy

Buenconsejo, Pio John S.; Kim, Hee-Young; Hosoda, Hideki; Miyazaki, S.

doi:10.1016/j.actamat.2008.10.041

Cited by 203 publications

(158 citation statements)

References 19 publications

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“…The consequence is the stabilization of β phase, and the decrease of the critical cooling rates by which the transformations β→α and β→ω were completely suppressed for all cooling conditions. Many other authors agree that the higher the Ta content is, the lower will be the M s temperature [3,5,[18][19][20]. In the case of the sample 2 (after homogenization treatment) the martensitic transformation β→α was suppressed and the resulted structure was formed only by β phase, attested by XRD patterns in Fig.…”

Section: Results and Discussion For Xrd Measurementsmentioning

confidence: 74%

XRD and nanoindentation testing of thermo-mechanical processed Ti-29Nb-9Ta-10Zr alloy

Cincă¹,

Nocivin²,

Răducanu³

et al. 2021

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Ti-Nb-Ta-Zr alloys (TNTZ) represent a new class of biomaterials, due to nontoxic chemical elements and promising combination of high mechanical resistance with low elastic modulus close to the bone elasticity (E = 20-40 GPa). The present paper proposes a particular chemical composition of this β type Ti alloy -Ti-29Nb-9Ta-10Zr (wt.%) with a particular material structure. Structural and mechanical characterization of four distinct alloy conditions corresponding to each TM stage was performed using XRD measurements and also nanoindentation measurements. The obtained results represent a solid base for complex optimization of the alloy's structural characteristics.K e y w o r d s : beta titanium alloy, thermo-mechanical processing, XRD spectra, nanoindentation

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Section: Results and Discussion For Xrd Measurementsmentioning

confidence: 74%

XRD and nanoindentation testing of thermo-mechanical processed Ti-29Nb-9Ta-10Zr alloy

Cincă¹,

Nocivin²,

Răducanu³

et al. 2021

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“…Tantalum is an alloy additive which will decrease the temperature of the martensite transformation, which -as a result -causes the expansion of the scope of the β phase in titanium-based alloys. The research has also confirmed that the addition of tantalum can inhibit the occurrence of undesirable phases such as the ω metastable phase [3,4]. The corrosion resistance of the Ti-Ta alloys is higher than the corrosion resistance of pure titanium or titanium-based alloys currently used in medicine [5].…”

Section: Introductionmentioning

confidence: 66%

Influence of High Energy Milling Time on the Ti-50Ta Biomedical Alloy Structure

et al. 2016

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Nickel-free titanium alloys are a promising research direction in the field of biomedical materials. Current literature reports indicate that there is a possibility of using the Ti-Ta alloys in medicine since these alloys have had satisfactory results as far as biocompatibility, resistance to corrosion and mechanical properties are concerned, which is an important aspect while considering the use of this alloy for long-lasting bone implants. This article presents the results of a high-energy milling process with the use of Ti and Ta powders. The ball-milling process was carried out for various times, including 20, 40, 60, 80, and 100 h. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The research confirmed partial synthesis of the materials during the process of high energy ball milling.

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“…β 상에서 α'' 상으로의 변태온도는 첨가 원소 의 양에 따라 제어될 수 있다. 현재까지 많은 β 형 Ti기 합금에서 형상기억특성이 나 타난다고 보고 되어지고 있다; 예를 들어, Ti-Ta 기 합 금, [24][25] Ti-Mo 기 합금 6-11) 그리고 Ti-Nb 기 합금. 2.…”

Section: 서 론unclassified

Effect of Oxygen Content on Shape Memory Characteristics of Ti-18Nb-6Zr-XO (X = 0~1.5at%) Alloys

Park¹,

Ock²,

Oh³

et al. 2011

Korean. J. Mater. Res.

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The effect of oxygen on the shape memory characteristics in Ti-18Nb-6Zr-XO (X = 0-1.5 at%) biomedical alloys was investigated by tensile tests. The alloys were fabricated by an arc melting method at Ar atmosphere. The ingots were coldrolled to 0.45 mm with a reduction up to 95% in thickness. After severe cold-rolling, the plate was solution-treated at 1173 K for 1.8 ks. The fracture stress of the solution-treated specimens increased from 450 Mpa to 880 MPa with an increasing oxygen content up to 1.5%. The fracture stress increased by 287MPa with 1 at% increase of oxygen content. The critical stress for slip increased from 430 MPa to 695 MPa with an increasing oxygen content up to 1.5 at%. The maximum recovery strain of 4.1% was obtained in the Ti-18Nb-6Zr-0.5O (at%) alloy. The martensitic transformation temperature decreased by 140 K with a 1.0 at% increase in O content, which is lower than that of Ti-22Nb-(0-2.0)O (at%) by 20 K. This may have been caused by the effect of the addition of Zr. This study confirmed that addition of oxygen to the Ti-Nb-Zr alloy increases the critical stress for slip due to solid solution hardening without being detrimental to the maximum recovery strain.Key words shape memory effect, superelasticity, biomaterials, martenite, Ti based alloy. 서 론생체용

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Shape memory behavior of Ti–Ta and its potential as a high-temperature shape memory alloy

Cited by 203 publications

References 19 publications

XRD and nanoindentation testing of thermo-mechanical processed Ti-29Nb-9Ta-10Zr alloy

XRD and nanoindentation testing of thermo-mechanical processed Ti-29Nb-9Ta-10Zr alloy

Influence of High Energy Milling Time on the Ti-50Ta Biomedical Alloy Structure

Effect of Oxygen Content on Shape Memory Characteristics of Ti-18Nb-6Zr-XO (X = 0~1.5at%) Alloys

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