Percolated Strain Networks and Universal Scaling Properties of Strain Glasses

Zong, Hongxiang; Wu, Haijun; Tao, Xuefei; Xue, Deqing; Sun, Jun; Pennycook, Stephen J.; Min, Tai; Zhang, Zhenyu; Ding, Xiangdong

doi:10.1103/physrevlett.123.015701

Cited by 23 publications

(20 citation statements)

References 58 publications

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“…We first try to reproduce the BP-like anomaly in strain glass. An MD simulation is performed to calculate the VDOS and Cp of a model alloy system, which has been confirmed as a reliable model system for strain-glass-involved simulation in the previous work 31 . Figure 3a shows the calculated VDOS as a function of frequency for different defect concentrations in this model system (Zr100-xNix).…”

Section: Resultsmentioning

confidence: 80%

“…The corresponding microstructure or phase structure is identified by order parameter ηi, which is estimated by the lattice distortion associated with the BCC to HCP transformation 38 . Our previous work has indicated that the properties of strain glass can be well reproduced by the atomistic models of Zr-Ni alloy system 31 . For example, as shown in Supplementary Fig.…”

Section: Discussionmentioning

confidence: 89%

“…The prevailing microstructural picture of strain glass is described as isolated martensitic nanodomains distributed randomly in the parent phase matrix 1,12,13 . Recently, the microstructural picture has been further developed to be that the martensitic nanodomains are surrounded by percolated strain networks in the matrix 31 .…”

Section: Resultsmentioning

confidence: 99%

“…A detailed description of this method can be found in Ref. 39. Recent works have described the strain glass as isolated martensite nanodomains embedded in the parent phase matrix with the help of the dopants induced strain networks 31 . Here, the atomic pinning method is adopted to extract the VDOS of the nanodomain regions and parent phase matrix separately.…”

Section: Discussionmentioning

confidence: 99%

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Boson-peak-like anomaly caused by transverse phonon softening in strain glass

Ren

Zong

Tao

et al. 2020

Preprint

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Strain glass is considered as a new glassy state with frozen ferroelastic/martensitic nanodomains in shape memory alloys, which exhibits many novel functionalities, yet its nature remains unclear. In this study, we reported a new dynamic relaxation behavior in strain glass that was thought to be only present in structural glasses. An abnormal hump was observed in strain glass around 10 K upon normalizing the specific heat (Cp) by cubed temperature, quite similar to the boson peak in metallic glass. The simulation studies showed that this boson-peak-like anomaly in Cp corresponds to excess low-frequency vibrational modes that stem from the transverse acoustic (TA) phonon softening of the non-transforming regions surrounding the nanodomains. The phonon softening takes place in the TA branches not associated with the martensitic transformation displacements. This work may provide a useful perspective for understanding the nature of glassy states and associated vibrational properties.

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Section: Resultsmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Boson-peak-like anomaly caused by transverse phonon softening in strain glass

Ren

Zong

Tao

et al. 2020

Preprint

Self Cite

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“…The data presented in table I suggest that a dopant concentration of ≤ 10 at.% induces the strain glassy state in a martensitic alloy. The strain glassy state proceeds via percolation [21] when a minor fraction of impurity dopant is added to a ferroelastic material. Similar observations can be made about the relaxor ferroelectric materials and the cluster spin glassy materials [22][23][24][25][26][27] wherein a small amount of impurity dopant forces a non-ergodic * krp@unigoa.ac.in…”

Section: Introductionmentioning

confidence: 99%

Structural defects responsible for the strain glassy transition in Ni50+xTi50−x

et al. 2021

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The strain glassy phase is produced by doping a small percentage of impurity in a martensitic alloy. Its ground state is conceived to consist of martensitic nano domains spatially separated from each other by a defect phase. The present study, by probing the local structure around the Ni and Ti in martensitic and strain glassy compositions of Ni50+xTi50−x, for the first time, identifies the defect phase that is responsible for inhibiting the long range ordering of the elastic strain vector leading to the formation of the strain glassy phase.

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Quasi‐Linear Superelasticity with Ultralow Modulus in Tensile Cyclic Deformed TiNi Strain Glass

Zhao

Liang

et al. 2022

Adv Eng Mater

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Herein, a quasi‐linear superelasticity (≈2.3%) with the ultralow elastic modulus (≈18 GPa) over a wide temperature range (≈55 K) in tensile cyclic deformed TiNi shape memory alloys is reported. Differential scanning analysis (DSC) and dynamic mechanical analysis (DMA) show the suppression of normal martensitic transformation (MT) and the appearance of strain glass transition behavior. Electron backscatter diffraction (EBSD) analysis shows the existence of high‐density defects involving twin boundaries and dislocations under tensile cyclic deformation. Further transmission electron microscope (TEM) observation reveals stabilized B19' nanodomains after tensile cyclic deformation. The observed deformation defects and stabilized B19' nanodomains impose significant influence on the following transition behavior and mechanical property, yielding the detected quasi‐linear superelasticity with ultralow modulus. Herein, an effective way to design unique phase transitions with unprecedented properties by defect engineering may be suggested.

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Percolated Strain Networks and Universal Scaling Properties of Strain Glasses

Cited by 23 publications

References 58 publications

Boson-peak-like anomaly caused by transverse phonon softening in strain glass

Boson-peak-like anomaly caused by transverse phonon softening in strain glass

Structural defects responsible for the strain glassy transition in Ni50+xTi50−x

Quasi‐Linear Superelasticity with Ultralow Modulus in Tensile Cyclic Deformed TiNi Strain Glass

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