| Fabrication and characterization of nanocrystalline Al/Al12（Fe,V）3Si alloys by consolidation of mechanically alloyed powders |
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| 作者姓名： | Hamid Ashrafi Rahmatollah Emadi Mohammad Hosein Enayati |
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| 作者单位： | Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran |
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| 摘 要： | The aim of this study was to produce bulk nanocrystalline Al/Al12（Fe,V）3Si alloys by mechanical alloying （MA） and subsequent hot pressing （HP） of elemental powders. A nanostructured Al-based solid solution was formed by MA of elemental powders for 60 h. After HP of the as-milled powders at 550℃ for 20 min, the Al12（Fe,V）3Si phase was precipitated in a nanocrystalline Al matrix. Scanning electron microscopy （SEM） images of the bulk samples represented a homogeneous and uniform microstructure that was superior to those previously obtained by rapid solidification-powder metallurgy （RS-PM）. Nanostructured Al-8.5Fe-1.3V-1.7Si and Al-11.6Fe-1.3V-2.3Si alloys ex-hibited high HV hardness values of～205 and～254, respectively, which are significantly higher than those reported for the RS-PM counter-parts.
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| 关 键 词： | 机械合金化 元素粉末 纳米铝 扫描电子显微镜 制造 整合 特性 纳米晶体 |
Fabrication and characterization of nanocrystalline Al/Al12(Fe,V)3Si alloys by consolidation of mechanically alloyed powders |
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| Hamid Ashrafi Rahmatollah Emadi Mohammad Hosein Enayati.Fabrication and characterization of nanocrystalline Al/Al12(Fe,V)3Si alloys by consolidation of mechanically alloyed powders[J].International Journal of Minerals,Metallurgy and Materials,2014,21(7):711-719. |
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| Authors: | Hamid Ashrafi Rahmatollah Emadi Mohammad Hosein Enayati |
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| Institution: | 1. Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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| Abstract: | The aim of this study was to produce bulk nanocrystalline Al/Al12(Fe,V)3Si alloys by mechanical alloying (MA) and subsequent hot pressing (HP) of elemental powders. A nanostructured Al-based solid solution was formed by MA of elemental powders for 60 h. After HP of the as-milled powders at 550°C for 20 min, the Al12(Fe,V)3Si phase was precipitated in a nanocrystalline Al matrix. Scanning electron microscopy (SEM) images of the bulk samples represented a homogeneous and uniform microstructure that was superior to those previously obtained by rapid solidification-powder metallurgy (RS-PM). Nanostructured Al-8.5Fe-1.3V-1.7Si and Al-11.6Fe-1.3V-2.3Si alloys exhibited high HV hardness values of ～205 and ～254, respectively, which are significantly higher than those reported for the RS-PM counterparts. |
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| Keywords: | aluminum alloys nanostructured materials mechanical alloying hot pressing hardness |
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