| 电场对AZ31B与Al连接界面扩散反应和扩散溶解层结构的影响 |
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| 引用本文： | 杜正良,刘奋军,陈少平,孟庆森.电场对AZ31B与Al连接界面扩散反应和扩散溶解层结构的影响[J].材料热处理学报,2010,31(3). |
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| 作者姓名： | 杜正良 刘奋军 陈少平 孟庆森 |
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| 作者单位： | 太原理工大学材料科学与工程学院,山西,太原,030024 |
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| 基金项目： | 国家自然科学基金项目(50671070);;山西省归国留学人员科学基金项目(2008-26) |
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| 摘 要： | 应用电场激活扩散连接技术(FADB)实现AZ31B与Al的连接。研究了电场对AZ31B/Al结合界面扩散反应和扩散溶解层结构的影响。采用光学显微镜、扫描电子显微镜、X射线能谱与X射线衍射仪等方法分析了扩散溶解层的显微组织、相组成和元素分布。结果表明,在FADB条件下以铝粉为中间层时扩散溶解层由均匀共晶层、过渡层和胞状晶组成;以铝箔为中间层时由镁合金侧共晶层和铝侧过渡层构成。电场强度对扩散溶解层宽度和形态均有显著影响。溶解层随电流密度升高而变宽。以铝粉为中间层在温度450℃,时间50min,电流密度80A·cm-2时过渡层宽度为120μm,为未施加电场时的12倍。电流对共晶层内晶粒尺寸有显著影响。当电流密度由28A·cm-2升至48A·cm-2时,点状晶粒晶粒尺寸由2μm降至0.5μm。
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| 关 键 词： | AZ31B Al 固相扩散 电场 扩散溶解 |
Influence of electric field on interfacial diffusion reaction and microstructure of diffusion dissolution layer of AZ31B/Al joint |
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| DU Zheng-liang,LIU Fen-jun,CHEN Shao-ping,MENG Qing-sen.Influence of electric field on interfacial diffusion reaction and microstructure of diffusion dissolution layer of AZ31B/Al joint[J].Transactions of Materials and Heat Treatment,2010,31(3). |
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| Authors: | DU Zheng-liang LIU Fen-jun CHEN Shao-ping MENG Qing-sen |
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| Affiliation: | College of Materials Science and Engineering/a>;Taiyuan University of Technology/a>;Taiyuan 030024/a>;China |
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| Abstract: | Interfacial diffusion reaction and structure of Mg-Al diffusion dissolution layer at interface of AZ31B/Al joints prepared by electric field-activated diffusion bonding(EFADB)process using aluminum powder and aluminium foil as intermediate layer, respectively, were investigated. The microstructure, phases and component distribution of the Mg-Al diffusion dissolution layer were analysed by means of optical microscope, SEM, EDS and XRD. The results show that when the intermediate layer is aluminum powder the ... |
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| Keywords: | AZ31B aluminum solid state diffusion electric field diffusion dissolution |
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