Cryogenic rejuvenation of Al-based amorphous-nanocrystalline alloys

Abrosimova, G. E.; Volkov, N. A.; Tuan, Tran Van; Першина, Е.А.; Аронин, А. С.

doi:10.1016/j.matlet.2018.12.131

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…One can see that the intensity of the reflection corresponding to nanocrystals (curve 5) decreases significantly during cryogenic cycling. The authors of [146,147] did not observe any signs of the crystalline phases with an increase in the treatment duration. So, it was shown that the method of cryogenic rejuvenation actually enables recovering an amorphous structure in partially crystalline alloys, thus increasing the plasticity of a material.…”

Section: Amorphous Structure Rejuvenationmentioning

confidence: 89%

“…The idea of induction of stresses in the alloy with the non-uniform distribution of the thermal expansion coefficients turned to be very promising. The use of this method allowed for the observation of a structural change in inhomogeneous amorphous Zr 46 Cu 38 Al 8 Ag 8 alloy [145], as well as completely recovering the amorphous phase in partially crystalline Al 88 Ni 6 Y 6 and Al 87 Ni 8 Gd 5 alloys [146,147]. The authors of the latter work used the idea of increasing the difference in the thermal expansion coefficients due to the formation of a small number of nanocrystals in the amorphous phase and the subsequent cryogenic thermal cycling of a structure consisting of the amorphous phase and Al nanocrystals uniformly distributed over it.…”

Section: Amorphous Structure Rejuvenationmentioning

confidence: 99%

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Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

Аронин

Abrosimova

2020

Metals

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This work is devoted to a brief overview of the structure and properties of amorphous-nanocrystalline metallic alloys. It presents the current state of studies of the structure evolution of amorphous alloys and the formation of nanoglasses and nanocrystals in metallic glasses. Structural changes occurring during heating and deformation are considered. The transformation of a homogeneous amorphous phase into a heterogeneous phase, the dependence of the scale of inhomogeneities on the component composition, and the conditions of external influences are considered. The crystallization processes of the amorphous phase, such as the homogeneous and heterogeneous nucleation of crystals, are considered. Particular attention is paid to a volume mismatch compensation on the crystallization processes. The effect of changes in the amorphous structure on the forming crystalline structure is shown. The mechanical properties in the structure in and around shear bands are discussed. The possibility of controlling the structure of fully or partially crystallized samples is analyzed for creating new materials with the required physical properties.

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Section: Amorphous Structure Rejuvenationmentioning

confidence: 89%

Section: Amorphous Structure Rejuvenationmentioning

confidence: 99%

Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

Аронин

Abrosimova

2020

Metals

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“…Last years, a new method for recovery of plasticity was found; it is cycling in a temperature range between room or elevated temperature and the temperature of liquid nitrogen [146,147]. The authors of the latter work used the idea of increasing the difference in the thermal expansion coefficients due to the formation of a small number of nanocrystals in the amorphous phase and the subsequent cryogenic thermal cycling of a structure consisting of the amorphous phase and Al nanocrystals uniformly distributed over it.…”

Section: Amorphous Structure Rejuvenationmentioning

confidence: 99%

Recent Advancements in Metallic Glasses

2021

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“…This method of influencing the structure has found application for both amorphous and crystalline materials [45,46]. Ultrasonic treatment is one of the deformation methods that allows varying free volume concentration in an amorphous material [44,46] and promoting structure rejuvenation similarly to thermal cycling [47,48]. Today, there are not many works on the investigation of a structure formed in amorphous alloys using this method.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Protective Coating on the Crystallization of an Amorphous Fe78Si13B9 Alloy

Abrosimova

Chirkova

Матвеев

et al. 2023

Metals

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The effect of free volume on the crystallization of amorphous Fe78Si13B9 ribbons was studied using ultrasonic and thermal treatments. To maintain free volume under heating, amorphous samples were coated with a special protective Ta coating. It has been shown via X-ray diffraction that the fraction of the crystalline phase in the annealed coated amorphous ribbons is higher than in the corresponding uncoated samples. The use of ultrasonic treatment and the application of a protective coating lead to the formation of a larger proportion of the crystalline phase during annealing. Differences in crystallization kinetics are discussed under the assumption that the concentration of free volume in amorphous samples affects their crystallization, as well as the role of the Ta coating preventing the release of free volume to the surface during heat treatment.

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Cryogenic rejuvenation of Al-based amorphous-nanocrystalline alloys

Cited by 14 publications

References 20 publications

Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

Specific Features of Structure Transformation and Properties of Amorphous-Nanocrystalline Alloys

Recent Advancements in Metallic Glasses

Influence of a Protective Coating on the Crystallization of an Amorphous Fe78Si13B9 Alloy

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