Effect of randomness on ferroelastic transitions: Disorder-induced hysteresis loop rounding in Ti-Nb-O martensitic alloy

Nii, Yoichi; Arima, T.; Kim, Hee-Young; Miyazaki, S.

doi:10.1103/physrevb.82.214104

Cited by 55 publications

(18 citation statements)

References 39 publications

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“…Therefore, the formation of the strain field owing to the oxygen addition should be the main factor for the suppression of the ¢ ¼ ¡AA martensitic transformation. 1418,20,22) As shown in Fig. 3, the plates of ¡AA martensite were refined by the oxygen addition, suggesting that the growth of the martensite plates was inhibited by the strain field of the oxygen atoms in the ¢ grains.…”

Section: Discussionmentioning

confidence: 92%

Effect of Oxygen Addition on the Formation of α′′ Martensite and Athermal ω in Ti–Nb Alloys

2019

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The effect of the addition of oxygen on the formation of the microstructure quenched from the ¢ phase of TiNb alloy was investigated based on the solid solution treatment (SST) temperature in the ¢ phase. The alloy ingots of Ti(12, 14, and 18)-at% Nb(0, 1, and 3)-at% O were arc-melted. They were homogenized at 1200°C for 3.6 ks and then hot-rolled at 850°C into 1.5-mm thick sheets. The specimens were solutiontreated at 1050 to 1200°C for 0.6 ks and then quenched in iced brine. The microstructure of the Ti(12, 14, and 18)-at% Nb alloys exhibited an ¡AA phase regardless of the SST temperature. The addition of oxygen in the Ti(14 and 18)-at% Nb alloys suppressed the ¢ ¼ ¡AA martensitic transformation; therefore, the quenched structure became the ¢ + ½ a phase. The further addition of oxygen suppressed the ¢ ¼ ½ a transformation during quenching. The effect of oxygen addition on the phase transformations of ¢ ¼ ¡AA and ¢ ¼ ½ a during quenching from the ¢ phase was weakened with an increasing SST temperature. [

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Section: Discussionmentioning

confidence: 92%

Effect of Oxygen Addition on the Formation of α′′ Martensite and Athermal ω in Ti–Nb Alloys

2019

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“…Recently, we reported anomalies in the microstructure and martensitic transformation behavior of the oxygen-added -Ti alloy [35][36][37][38]. Diffuse scattering along < 0 1 1 > * was confirmed in the selected area diffraction patterns (SADPs) which is due to the nanosized (< 3 nm) { 0 1 1 }< 0 1 1 > transverse type lattice modulation (nanodomain) in the  phase.…”

Section: Introductionmentioning

confidence: 93%

Heating-induced martensitic transformation and time-dependent shape memory behavior of Ti–Nb–O alloy

et al. 2014

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Temperature dependence of nano-sized lattice modulation (nanodomains) which was introduced by oxygen atoms and martensitic transformation behavior of the (Ti-23Nb)-1.0O alloy were systematically investigated. Nanodomains in the  phase became unstable at higher temperatures and disappeared above 373 K, where time-dependent heating-induced forward transformation (HIFT) was confirmed in the (Ti-23Nb)-1.0O alloy. Thermally activated process of HIFT in the (Ti-23Nb)-1.0O alloy was the diffusion of oxygen atoms in nanodomains.Anomalous temperature dependence of shape memory behavior was also confirmed in the (Ti-23Nb)-1.0O alloy and its mechanism was successfully explained by the diffusion of oxygen atoms during tensile deformation.

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“…Nii at al. and Tahara et al [24], [25] worked on oxygen addition in Ti-26Nb alloy. Both demonstrated a change of the stress-strain curves by the addition of 1%at.%O to the Ti-26Nb alloy : ultimate tensile strength (UTS) increased from around 300MPa to 700MPa and no martensitic transformation was observed.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Synthesis and characterization of Ti-27.5Nb alloy made by CLAD® additive manufacturing process for biomedical applications

Fischer

Laheurte

Acquier

et al. 2017

Materials Science and Engineering: C

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Biocompatible beta-titanium alloys such as Ti-27.5(at.%)Nb are good candidates for implantology and arthroplasty applications as their particular mechanical properties, including low Young's modulus, could significantly reduce the stress-shielding phenomenon usually occurring after surgery. The CLAD® process is a powder blown additive manufacturing process that allows the manufacture of patient specific (i.e. custom) implants. Thus, the use of Ti-27.5(at.%)Nb alloy formed by CLAD® process for biomedical applications as a mean to increase cytocompatibility and mechanical biocompatibility was investigated in this study. The microstructural properties of the CLAD-deposited alloy were studied with optical microscopy and electron back-scattered diffraction (EBSD) analysis. The conservation of the mechanical properties of the Ti-27.5Nb material after the transformation steps (ingot-powder atomisation-CLAD) were verified with tensile tests and appear to remain close to those of reference material. Cytocompatibility of the material and subsequent cell viability tests showed that no cytotoxic elements are released in the medium and that viable cells proliferated well.

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Effect of randomness on ferroelastic transitions: Disorder-induced hysteresis loop rounding in Ti-Nb-O martensitic alloy

Cited by 55 publications

References 39 publications

Effect of Oxygen Addition on the Formation of α′′ Martensite and Athermal ω in Ti–Nb Alloys

Effect of Oxygen Addition on the Formation of α′′ Martensite and Athermal ω in Ti–Nb Alloys

Heating-induced martensitic transformation and time-dependent shape memory behavior of Ti–Nb–O alloy

Synthesis and characterization of Ti-27.5Nb alloy made by CLAD® additive manufacturing process for biomedical applications

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