Atomic-scale understanding of the reversible HCP↔FCC phase transition mechanisms at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:mrow><mml:mo>{</mml:mo><mml:mrow><mml:mn>10</mml:mn><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>1</mml:mn></mml:mrow><mml:mo>}</mml:mo></mml:mrow></mml:math> twin tip in pure titanium

Zhang, Hao; Wei, Bingqiang; Ou, Xiaoqin; Ni, Song; Yan, Hongge; Song, Min

doi:10.1016/j.ijplas.2022.103357

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…The reverse martensitic transformation fcc ↔ hcp has also been observed in FeMnSi-based shape memory alloys [ 59 ], austenitic stainless steels, pure titanium [ 60 ], and metastable interstitial HEAs [ 61 ]. Different mechanisms, including shear reverse transformation (diffusionless) and thermal (diffusional) transformation, have been proposed for the reverse transformation of the hcp-ε phase to the fcc phase based on the chemical composition, , SFE, temperature, and heating rate.…”

Section: Resultsmentioning

confidence: 99%

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys

Ebrahimian

Rizi

Hong

et al. 2023

Science and Technology of Advanced Materials

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The remarkable properties of high-entropy alloys (HEAs) have resulted in their increased research interest and prompted the use of various strategies to enhance their mechanical properties. In this study, the effects of Mo on the hot compressive deformation behavior of carbon-containing FeMn 40 Co 10 Cr 10 HEAs in the temperature range of 800–1000°C and strain rate of 0.001–0.1 s −1 was investigated. The microstructural evolutilon and phase structure were characterized by X-ray diffraction and electron backscattered diffraction. The effects of strain, strain rate, and deformation temperature on the thermally activated deformation restoration process of the Fe 39.5 Mn 40 Co 10 Cr 10 C 0.5 and Fe 38.3 Mn 40 Co 10 Cr 10 C 0.5 Mo 1.7 HEAs during hot compression were represented by the Zener–Hollomon parameter. Dynamic recrystallization was initiated at 800°C with the strain rate of 0.001–0.1 s −1 . The precipitation of the M 23 C 6 carbide along the grain boundaries and within the matrix exerted a strong pinning effect on the grain/subgrain boundaries and promoted dynamic recrystallization through the particle-stimulated nucleation of recrystallization. Moreover, the addition of Mo to the Fe 39.5 Mn 40 Co 10 Cr 10 C 0.5 HEA changed the dynamic recrystallization mechanism by reducing the stacking fault energy and enhancing the reverse phase transformation. The heterogeneous microstructure composed of ultrafine, fine, and larger grains in the Fe 38.3 Mn 40 Co 10 Cr 10 C 0.5 Mo 1.7 HEA could be obtained by the nucleation of new recrystallized grains at large deformed grain boundaries adjacent to the first necklace structures and shear bands.

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Section: Resultsmentioning

confidence: 99%

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys

Ebrahimian

Rizi

Hong

et al. 2023

Science and Technology of Advanced Materials

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“…It has been reported that aluminum (Al), Ti, Zr, cobalt (Co), copper (Cu), and Au all undergo a reversible phase transition from hcp to the fcc phase. At certain high temperatures, some metals such as Co and Ti undergo a phase change from hcp to bcc .…”

Section: Crystal Structures and Polymorphicsmentioning

confidence: 99%

“…65 The interlayer stacking order affects the properties and defects of the structure and is expected to lead to new possibilities for catalytic, plasma, optical, and electrical applications. 76 It has been reported that aluminum (Al), 77 Ti, 78 Zr, 79 cobalt (Co), 80 copper (Cu), and Au 81 all undergo a reversible phase transition from hcp to the fcc phase. At certain high temperatures, some metals such as Co 80 and Ti 82 undergo a phase change from hcp to bcc.…”

Section: Hexagonal-close Packed (Hcp) Phasementioning

confidence: 99%

In Situ TEM Characterization and Modulation for Phase Engineering of Nanomaterials

Han,

Wang,

Cao

et al. 2023

Chem. Rev.

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Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

Luo,

Han,

Cappola

et al. 2024

Adv Eng Mater

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Cadmium telluride (CdTe) is a highly promising material for photovoltaics and photodetectors due to its light‐absorbing properties. However, efficient design and use of flexible devices require a deep understanding of its atomic‐level deformation mechanism. Here, we investigate uniaxial compression deformation of CdTe monocrystalline with varying crystal orientations using molecular dynamics (MD) with a newly developed machine‐learning force field, alongside in‐situ micropillar compression experiments. Our findings reveal that CdTe bulk deformation is dominated by reversible martensitic phase transformation, whereas CdTe pillar deformation is primarily driven by dislocation nucleation and movement. CdTe monocrystals possess exceptional super‐recoverable deformation along the <100> orientation due to hyper‐elastic processes induced by martensitic transformation. This discovery not only sheds light on the peculiarities observed in micropillar experimental measurements but also provides pivotal insights into the fundamental deformation behaviors of CdTe and similar II‐VI compounds under various stress conditions. These insights are crucial for the innovative design and enhanced functionality of future flexible electronic devices.This article is protected by copyright. All rights reserved.

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Atomic-scale understanding of the reversible HCP↔FCC phase transition mechanisms at {101¯1} twin tip in pure titanium

Cited by 7 publications

References 56 publications

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys

In Situ TEM Characterization and Modulation for Phase Engineering of Nanomaterials

Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

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Atomic-scale understanding of the reversible HCP↔FCC phase transition mechanisms at {101¯1} twin tip in pure titanium

Cited by 7 publications

References 56 publications

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe 40 Mn 40 Co 10 Cr 10 C 0.5 high entropy alloys

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe 40 Mn 40 Co 10 Cr 10 C 0.5 high entropy alloys

In Situ TEM Characterization and Modulation for Phase Engineering of Nanomaterials

Hyper‐Elastic Deformation via Martensitic Phase Transformation in Cadmium Telluride

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Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys

Effects of molybdenum on hot deformation behavior and microstructural evolution of Fe ₄₀ Mn ₄₀ Co ₁₀ Cr ₁₀ C _0.5 high entropy alloys