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.
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页码：398 / 402
页数：4
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