Spontaneous strain glass to martensite transition in a Ti<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>50</mml:mn></mml:msub></mml:math>Ni<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>44.5</mml:mn></mml:mrow></mml:msub></mml:math>Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mrow><mml:mn>5.5</mml:mn></mml:mrow></mml:msub></mml

Zhang, Jian; Wang, Yu; Ding, Xiangdong; Zhang, Zhen; Zhou, Yumei; Ren, Xiaobing; Wang, Dong; Ji, Yuanchao; Song, Minghui; Otsuka, Kazuhiro; Sun, Jun

doi:10.1103/physrevb.84.214201

Cited by 55 publications

(62 citation statements)

References 28 publications

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“…According to X. Ren et al, 11 the strain glass is of a "frozen" short-range ordered state of the ferroelastic (martensite) phase and identified with the following four characteristics in analogy with spin glass and relaxor: (i) the strain glass state is non-ergodic; (ii) the transition from an ergodic austenite state to a strain glass state, which is similar to glass transition, exists; (iii) the average crystal structure of strain glass is the same as that in the austenite phase; (iv) the strain glass exhibits a local or a short-range strain order. Although these features have been reported in some Ti-Ni-and Ti-Pd-based alloys, 8,[11][12][13][14][15] the concept of strain glass has not been enough developed and further investigations to deeply understand this phenomenon are required. In the present work, martensitic transformation behaviors at low temperatures in the Ti-51.8Ni alloy, which shows no thermal transformation in a stress-free condition and is thought to be in the strain glass region, 12 were investigated by compression tests in both temperature-and stress-fixed conditions.…”

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confidence: 95%

Stress-induced transformation behaviors at low temperatures in Ti-51.8Ni (at. %) shape memory alloy

Niitsu

Omori

Kainuma

2013

Applied Physics Letters

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Martensitic transformation behaviors at low temperatures in polycrystalline Ti-51.8Ni (at. %) alloy were investigated with compressive stress. Superelasticity with almost complete shape recovery was confirmed at temperatures of 40–180 K. In stress-induced transformation at fixed temperatures, while the reverse transformation finishing stress monotonically decreased with decreasing test temperature, the forward transformation starting stress changed from decrease to increase at about 125 K. Forward and reverse transformation temperatures evaluated under constant stresses of 50 and 750 MPa were generally coincident with the results determined at the constant temperatures, where “heating-induced forward transformation” was confirmed under a stress of 750 MPa.

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mentioning

confidence: 95%

Stress-induced transformation behaviors at low temperatures in Ti-51.8Ni (at. %) shape memory alloy

Niitsu

Omori

Kainuma

2013

Applied Physics Letters

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“…It could be the consequence of non-equilibrium characteristic of the C-phase such as so-called strain glass behavior. 21,22) Observation of change in crystal structure under stress is the subject in the future.…”

Section: Path Dependence Of the Transformationmentioning

confidence: 99%

Mechanical Properties of the R-Phase and the Commensurate Phase under [111] Tensile Stress in Iron-Doped Titanium-Nickel Alloys

et al. 2016

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We have studied deformation behavior of two kinds of iron-doped Ti-Ni shape memory alloys under tensile stress applied in the [111] direction. One is Ti-46Ni-4Fe (at%) alloy which transforms to the R-phase and the other is Ti-44Ni-6Fe (at%) alloy which transforms to the commensurate phase (C-phase) in the cooling process. The stress-strain curve measured in the R-phase region shows a residual strain due to rearrangement of variants while that measured in the C-phase shows a pseudoelastic behavior characteristic to stress-induced martensitic transformations. The strain-temperature curve measured under constant stress shows an obvious transformation strain associated with the transformation to the R-phase, while a bend point appears associated with the transformation to the C-phase.

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“…The alloy composition was chosen in such a way that the B2↔R transformation type occurred, and the R martensitic phase could be tested over a wide temperature range. Such a situation takes place for TiNi 50−x Fe x alloys with 3 < x < 5 [7]. Although there are data in the literature on the elastic and anelastic properties of Ti-Ni 50−x Fe x alloys [7][8][9][10][11][12][13][14][15], most of the data refer either to low x values, providing a narrow temperature range of the R phase, or to high ones, suppressing the martensitic transformation.…”

Section: Introductionmentioning

confidence: 91%

Effect of Hydrogen on the Elastic and Anelastic Properties of the R Phase in Ti50Ni46.1Fe3.9 Alloy

Sapozhnikov

Torrens‐Serra

Cesari

et al. 2017

Metals

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Abstract:The linear and non-linear internal friction, effective Young's modulus, and amplitude-dependent modulus defect of a Ti 50 Ni 46.1 Fe 3.9 alloy have been studied after different heat treatments, affecting hydrogen content, at temperatures of 13-300 K, and frequencies near 90 kHz. It has been shown that the contamination of the alloy by hydrogen gives rise to an internal friction maximum in the R martensitic phase and a complicated pinning stage in the temperature dependence of the effective Young's modulus at temperatures corresponding to the high-temperature side of the maximum. Dehydrogenation of the H-contaminated alloy transforms the internal friction maximum into a plateau and minimizes the pinning stage. The internal friction maximum is associated with a competition of two different temperature-dependent processes affecting the hydrogen concentration in the core regions of twin boundaries. The amplitude-dependent anelasticity of the R phase is also very sensitive to hydrogen content, its temperature dependence reflects the evolution of extended hydrogen atmospheres near twin boundaries.

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Spontaneous strain glass to martensite transition in a Ti50Ni44.5Fe5.5

Cited by 55 publications

References 28 publications

Stress-induced transformation behaviors at low temperatures in Ti-51.8Ni (at. %) shape memory alloy

Stress-induced transformation behaviors at low temperatures in Ti-51.8Ni (at. %) shape memory alloy

Mechanical Properties of the R-Phase and the Commensurate Phase under [111] Tensile Stress in Iron-Doped Titanium-Nickel Alloys

Effect of Hydrogen on the Elastic and Anelastic Properties of the R Phase in Ti50Ni46.1Fe3.9 Alloy

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