Structural-Phase State and the Properties of Silumin after Electron-Beam Surface Treatment

—Modern materials-science techniques are used to analyze the gradient structural-phase states and the nanohardness of hypereutectic silumin after high-current electron-beam melting of the surface layer. Electron-beam treatment is shown to dissolve silicon inclusions and intermetallic compounds obser...

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Published in:Russian metallurgy Metally 2019-04, Vol.2019 (4), p.398-402
Main Authors: Ivanov, Yu. F., Gromov, V. E., Konovalov, S. V., Zagulyaev, D. V., Petrikova, E. A.
Format: Article
Language:English
Subjects:
Advanced Materials and Technologies
Alloying elements
Aluminum
Cellular structure
Chemistry and Materials Science
Electron beams
Hardness
Inclusions
Intermetallic compounds
Lamella
Lamellar structure
Materials Science
Metallic Materials
Nanohardness
Radiation effects
Silicon compounds
Solidification
Surface layers
Surface treatment
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container_issue 4
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container_title Russian metallurgy Metally
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creator Ivanov, Yu. F.
Gromov, V. E.
Konovalov, S. V.
Zagulyaev, D. V.
Petrikova, E. A.
description —Modern materials-science techniques are used to analyze the gradient structural-phase states and the nanohardness of hypereutectic silumin after high-current electron-beam melting of the surface layer. Electron-beam treatment is shown to dissolve silicon inclusions and intermetallic compounds observed in the initial state and form an aluminum cellular high-rate solidification structure and lamella eutectic grains. The content of alloying elements decreases by a factor of 1.5–2. The hardness of the irradiated silumin is found to change nonmonotonically and achieves its maximum at a distance of 30–50 μm from the surface. The maximum value is four times higher than the hardness of the unirradiated material. The radiation-induced changes in the silumin structure and hardness are explained.
doi_str_mv 10.1134/S0036029519040189
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subjects Advanced Materials and Technologies
Alloying elements
Aluminum
Cellular structure
Chemistry and Materials Science
Electron beams
Hardness
Inclusions
Intermetallic compounds
Lamella
Lamellar structure
Materials Science
Metallic Materials
Nanohardness
Radiation effects
Silicon compounds
Solidification
Surface layers
Surface treatment
title Structural-Phase State and the Properties of Silumin after Electron-Beam Surface Treatment
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