Change in the free volume in amorphous Al88Ni10Y2 alloy under plastic deformation

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Abstract

The surface morphology and structure of the amorphous Al88Ni10Y2 alloy subjected to deformation by multiple cold rolling were studied using X-ray diffraction and scanning electron microscopy. It was shown that during plastic deformation, steps are formed on the surface of the amorphous alloy due to the emergence of shear bands on the surface. It was found that aluminum crystals are formed in the deformed alloy. The steps on the surface of the deformed alloy were analyzed using the images obtained by the scanning electron microscopy method. It was shown that the length of the steps remains approximately the same when examining the surface of different areas of the deformed alloy. An assessment was made of the change in the fraction of free volume in the studied alloy during plastic deformation. The applied methodology made it possible to assess the difference in the density of undeformed and deformed alloys of different compositions using electron microscopic images. Determining the change in free volume content in amorphous alloys subjected to plastic deformation is a key factor in studying the ways of forming amorphous-nanocrystalline structures with improved mechanical properties.

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About the authors

V. V. Chirkova

Yu.A. Osipyan Institute of Solid State Physics RAS

Author for correspondence.
Email: valyffkin@issp.ac.ru
Russian Federation, Chernogolovka

N. A. Volkov

Yu.A. Osipyan Institute of Solid State Physics RAS

Email: valyffkin@issp.ac.ru
Russian Federation, Chernogolovka

G. E. Abrosimova

Yu.A. Osipyan Institute of Solid State Physics RAS

Email: valyffkin@issp.ac.ru
Russian Federation, Chernogolovka

A. S. Aronin

Yu.A. Osipyan Institute of Solid State Physics RAS

Email: valyffkin@issp.ac.ru
Russian Federation, Chernogolovka

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Supplementary files

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2. Fig. 1. Scheme of studying the surface of a deformed alloy using scanning electron microscopy; n is the number of images obtained.

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3. Fig. 2. X-ray diffraction pattern of an amorphous alloy before deformation.

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4. Fig. 3. X-ray diffraction pattern of the alloy after deformation indicating the reflection indices from aluminum crystals.

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5. Fig. 4. Examples of images of the surface of a deformed alloy: a section near the edge (a) and in the middle of the sample (b).

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6. Fig. 5. Examples of images of the surface of a deformed alloy with highlighted steps: a section near the edge (a) and in the middle of the sample (b).

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7. Fig. 6. Dependence of the total length of steps l on the distance from the edge of the alloy sample x after deformation.

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