Surface modification of 5083 Al alloy by electrical discharge alloying processing with a 75 mass%Si-Fe alloy electrode

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• 作者：Kuralay Stambekova^a ; Hung-Mao Lin^b ; Jun-Yen Uan^a ; ^{jyuan@dragon.nchu.edu.tw}
• 关键词：Electrical discharge alloying process ; Alloying layer ; Amorphous ; Corrosion
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 March, 2012
• 卷：258
• 期：10
• 页码：4483-4488
• 文件大小：1082 K

摘要

This study experimentally investigates the surface modification of 5083 Al alloy by the electrical discharge alloying (EDA) process with a Si-Fe alloy as an electrode. Samples were analyzed by transmission electron microscopy (TEM), scanning electron microscopy (SEM), micro-hardness and corrosion resistance tests. The micro-hardness of EDA alloyed layer was evidently higher than that of the base metal (5083 Al alloy). The TEM results show that the matrix of the alloyed layer has an amorphous-like structure; the matrix contains fine needle-like Si particles, block-like Si particles and nano-size Al_4.5FeSi and Al₁₃Fe₄ particles. The TEM results support experimental results for the high hardness of the alloyed layer. Moreover, the EDA alloyed layer with composite microstructures has good corrosion resistance in NaCl aqueous solution.