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

被引：0

作者：

Yu. F. Ivanov

V. E. Gromov

S. V. Konovalov

D. V. Zagulyaev

E. A. Petrikova

机构：

[1] Institute of High-Current Electronics,

[2] Siberian Branch,undefined

[3] Russian Academy of Sciences,undefined

[4] Tomsk National Research State University,undefined

[5] Siberian State Industrial University,undefined

[6] Korolev Samara National Research University,undefined

来源：

Russian Metallurgy (Metally) | 2019年 / 2019卷

关键词：

silumin; electron beams; solidification cells; eutectic; inclusions; intermetallic compound; nanohardness;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Abstract—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.

引用

页码：398 / 402

页数：4

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