国家自然科学基金(50774075)

作品数：6被引量：83H指数：4
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相关作者：汪彬周吉学童文辉杨院生王杰更多>>
相关机构：中国科学院金属研究所山东科学院更多>>
相关期刊：《Transactions of Nonferrous Metals Society of China》《稀有金属材料与工程》《Journal of Materials Science & Technology》更多>>
相关主题：脉冲磁场MG-GD-Y-ZRMG-GDZR合金合金凝固更多>>
相关领域：金属学及工艺一般工业技术化学工程更多>>
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冷却速率对Mg-Gd-Y-Zr合金凝固组织的影响(英文)被引量：11
《稀有金属材料与工程》2010年第11期1899-1902,共4页周吉学 杨院生 童文辉 王杰 付俊伟 汪彬 
National Natural Science Foundation of China (50774075);National Science and Technology Support Plan Project (2006BAE04B01-4)
通过改变凝固过程中的冷却速率,研究了冷却速率对Mg-Gd-Y-Zr合金凝固组织与成分微观偏析的影响。随冷却速率提高,合金组织明显细化,初生相形貌由粗大等轴枝晶逐渐向细小树枝晶转变,合金凝固过程中形核率增加,合金晶粒尺寸逐渐减小;冷却...
关键词：冷却速率 合金凝固组织 MICROSTRUCTURE cooling rate 合金凝固过程 MICROSTRUCTURE 微观偏析 合金元素 solid solubility volume fraction 等轴枝晶 significant 组织分布 溶质元素 扩散速率 晶粒尺寸 合金组织 共晶 形核率 相形貌 
Effects of RE and Sr additions on dendrite growth and phase precipitation in AZ91D magnesium alloy被引量：3
《Transactions of Nonferrous Metals Society of China》2010年第B07期331-335,共5页周吉学 王杰 王晶 杨院生 
Project(50774075) supported by the National Natural Science Foundation of China;Project(2007CB613705) supported by the National Basic Research Program of China
To develop AZ91D alloys with fine microstructure, effects of the addition of rare earth (RE), Sr and RE + Sr on the dendrite growth and phase precipitation in AZ91D magnesium alloy were studied, respectively. The resu...
关键词：magnesium alloy AZ91D strontium （Sr） rare earth grain refinement precipitation dendrite growth 
Simulation of electromagnetic-flow fields in Mg melt under pulsed magnetic field被引量：14
《Transactions of Nonferrous Metals Society of China》2010年第2期283-288,共6页汪彬 杨院生 马晓平 童文辉 
Project(50774075)supported by the National Natural Science Foundation of China;Project(2006BAE04B01-4)supported by Key Technologies R&D Program,China
The effects of a pulsed magnetic field on the solidified microstructure of pure Mg were investigated.The results show that microstructure of pure Mg is considerably refined via columnar-to-equiaxed growth under the pu...
关键词：pulsed magnetic field numerical simulation pure Mg microstructure refinement 
脉冲磁场对Mg-Gd-Y-Zr合金凝固及力学性能的影响被引量：41
《稀有金属材料与工程》2009年第3期519-522,共4页汪彬 杨院生 周吉学 童文辉 
国家自然科学基金项目资助(50774075)
在Mg-Gd-Y-Zr合金凝固过程中施加不同频率的脉冲磁场,研究脉冲磁场对Mg-Gd-Y-Zr合金凝固的影响。实验结果表明,脉冲磁场使Mg-Gd-Y-Zr合金晶粒细化,在频率为5Hz条件下获得最佳的晶粒细化效果,平均晶粒尺寸从未加脉冲磁场条件下的65μm细...
关键词：脉冲磁场 凝固组织 晶粒细化 Mg-Gd—Y-Zr合金 
Microstructure refinement of AZ91D alloy solidified with pulsed magnetic field被引量：27
《中国有色金属学会会刊：英文版》2008年第3期536-540,共5页汪彬 杨院生 周吉学 童文辉 
Project(50774075) supported by the National Natural Science Foundation of China;Project(2006BAE04B01-4) supported by the Key Technologies R&D Program of Ministry of Science and Technology of China
The effects of pulsed magnetic field on the solidified microstructure of an AZ91D magnesium alloy were investigated. The experimental results show that the remarkable microstructural refinement is achieved when the pu...
关键词：铝镁合金 晶粒细化 脉冲磁场 凝固结构 
Influence of Electric Current on Kirkendall Diffusion of Zn/Cu Couples
《Journal of Materials Science & Technology》2008年第3期410-414,共5页Yingju LI Yuansheng YANG Xiaohui FENG 
This work was supported by the National Natural Science Foundation of China （Grants No. 50374062 and 50774075）.
The influence of electric current on Kirkendall diffusion in Zn/Cu couples was investigated. Under the action of different electric currents, the Zn/Cu diffusion couples were annealed at 785℃ for different holding ti...
关键词：Electric current ELECTROMIGRATION Kirkendall effect Darken equations 
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