Effect of Al Addition on Superelastic Properties of Aged Ti&amp;ndash;Nb&amp;ndash;Zr&amp;ndash;Al Quaternary Alloys

Tada, Hiroyuki; Yamamoto, T.; Wang, Xinmin; Kato, Hidemi

doi:10.2320/matertrans.m2012184

Cited by 18 publications

(14 citation statements)

References 43 publications

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“…Among many alloying elements, Zr and Ta have attracted considerable attention due to their superior biocompatibility [19]. Many kinds of ternary and multinary alloys including Zr and/or Ta have been developed up to date, e.g., Ti-Nb-Ta [20][21][22][23][24][25], Ti-Nb-Zr [16,18,22,24,[26][27][28][29][30][31], Ti-Nb-Ta-Zr [17,32,33], Ti-Nb-Zr-Sn [34][35][36][37][38], TiNb-Zr-Al [39], and Ti-Nb-Zr-Mo-Sn [40]. Although substantial advances have been made in developing biomedical superelastic alloys, the understanding on the martensitic transformation behavior of Ti-Nb-base alloys is not sufficient yet.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure, Transformation Strain, and Superelastic Property of Ti–Nb–Zr and Ti–Nb–Ta Alloys

Kim

Tobe

et al. 2015

Shap. Mem. Superelasticity

151

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The composition dependences of transformation strain and shape memory, and superelastic properties were extensively investigated in Ti-Nb-Zr and Ti-Nb-Ta alloys in order to establish the guidelines for alloy design of biomedical superelastic alloys. The effects of composition on the crystal structure of the parent (b) phase and the martensite (a 00 ) phase were also investigated. Results showed that not only transformation temperature but also transformation strain is tunable by alloy design, i.e., adjusting contents of Nb, Zr, and Ta. The lattice constant of the b phase increased linearly with increasing Zr content, while it was insensitive to Nb and Ta contents. On the other hand, the lattice constants of the a 00 phase are mainly affected by Nb and Ta contents. The increase of Zr content exhibited a weaker impact on the transformation strain compared with Nb and Ta. The addition of Zr as a substitute of Nb with keeping superelasticity at room temperature significantly increased the transformation strain. On the other hand, the addition of Ta decreased the transformation strain at the compositions showing superelasticity. This study confirmed that the crystallography of martensitic transformation can be the main principal to guide the alloy design of biomedical superelastic alloys.

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Section: Introductionmentioning

confidence: 99%

Crystal Structure, Transformation Strain, and Superelastic Property of Ti–Nb–Zr and Ti–Nb–Ta Alloys

Kim

Tobe

et al. 2015

Shap. Mem. Superelasticity

151

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“…2533) Particularly, there has been tremendous progress in developing Ti-Nb base shape memory alloys in the past decade and many Ti-Nb base alloys have been developed, e.g. Ti-Nb-Sn, 26,34) Ti-NbAl, 31,32,35) Ti-Nb-Ta, 36,37) Ti-Nb-Zr, 3844) Ti-Nb-Mo, 45,46) TiNb-Pd, 47) Ti-Nb-O, 48) Ti-Nb-N, 49,50) Ti-Nb-Pt, 51) Ti-Nb-TaZr, 5254) Ti-Nb-Zr-Sn, 5557) Ti-Nb-Mo-Sn, 5860) Ti-Zr-NbSn, 61) Ti-Nb-Zr-Al 62) and Ti-Nb-Zr-Mo-Sn. 63) This paper aims to provide an overview of the recent works on Ti-Nb base shape memory alloys.…”

Section: Introductionmentioning

confidence: 99%

Martensitic Transformation and Superelastic Properties of Ti-Nb Base Alloys

2015

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Ti-Nb base alloys have been proposed as prospective candidates for Ni-free biomedical superelastic alloys due to their excellent mechanical properties with good biocompatibility, and many kinds of Ti-Nb base alloys exhibiting shape memory effect or superelasticity have been developed up to now. However, typical Ti-Nb base superelastic alloys show a small recovery strain which is less than one third of the recovery strain of practical Ti-Ni superelastic alloys. Over the last decade there have been extensive efforts to improve the properties of Ti-Nb base superelastic alloys through microstructure control and alloying. Low temperature annealing and aging are very effective to increase the critical stress for slip due to fine subgrain structure and precipitation hardening. The addition of interstitial alloying elements such as O and N raises the critical stress for slip and improves superelastic properties. In this paper, the roles of alloying elements on the martensitic transformation temperature, crystal structure, microstructure and deformation behavior in the Ti-Nb base alloys are reviewed and the alloy design strategy for biomedical superelastic alloys is proposed.

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“…22) Song et al have reported that superelastic behavior disappears after aging at 473, 523, 573, 773 and 823 K in Ti 9.8Mo3.9Nb2V3.1Al (mass%) alloy, 23) even though the alloy shows superelastic behavior after aging at 373, 623, 673 and 723 K. They described the precipitation and coarsening of ¡ and ½ phase, and related them to this behavior. In our previous study, the stress required for martensitic transformation (· M ) of Ti 72 Nb 15 Zr 10 Al 3 alloy decreased with increasing aging temperature from 453 to 553 K. 24) However, the details of this phenomenon and the mechanism of the non-monotonic aging temperature dependence are still unclear. The present study focused on the aging properties of the quaternary Ti 72 Nb 15 Zr 10 Al 3 alloy.…”

Section: Introductionmentioning

confidence: 96%

“…Li et al have reported that the critical stress for martensitic transformation remains stable in TiNb 24 Zr 2 alloy aged at 573 K for 7.2, 10.8 and 14.4 ks. They suggest that this aging behavior is related to suppression of the extent of ¢-formation in the matrix, and the large amount of ¢-stabilizing elements present in the alloy.…”

Section: Introductionmentioning

confidence: 99%

Non-Monotonic Aging Temperature Dependence of Superelasticity of Ti72Nb15Zr10Al3 Quaternary Alloys

et al. 2013

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The influence of aging on the superelastic behavior of Ti 72 Nb 15 Zr 10 Al 3 alloy (which is associated with the martensitic transformation from ¢ to ¡″ martensite) was investigated. The precipitation of ½ phase during aging significantly affects the mechanical properties. A non-monotonic change in the stress required for martensitic transformation was observed as the aging temperature changed from 453 to 603 K. This variation in stress may be attributed to two factors: change of chemical composition in the matrix and internal strain because of ½ phase formation. The likely variation in the stress for martensitic transformation associated with each of these effects was estimated. As the volume fraction of ½ phase increased, the change in the chemical composition produced a greater effect than the change in the internal strain.

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Effect of Al Addition on Superelastic Properties of Aged Ti–Nb–Zr–Al Quaternary Alloys

Cited by 18 publications

References 43 publications

Crystal Structure, Transformation Strain, and Superelastic Property of Ti–Nb–Zr and Ti–Nb–Ta Alloys

Crystal Structure, Transformation Strain, and Superelastic Property of Ti–Nb–Zr and Ti–Nb–Ta Alloys

Martensitic Transformation and Superelastic Properties of Ti-Nb Base Alloys

Non-Monotonic Aging Temperature Dependence of Superelasticity of Ti<sub>72</sub>Nb<sub>15</sub>Zr<sub>10</sub>Al<sub>3</sub> Quaternary Alloys

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