钪,硅对Al-Mg-Cu合金时效初期微结构演化的作用

中国稀土学报, 2008, 26(5): 661-665.

钪,硅对Al-Mg-Cu合金时效初期微结构演化的作用

张丽娜 ^1, , 高英俊 ^2, , 易杰 ^3, , 李建勋 ^4, , 苏义勇 ^5,

1.广西大学物理科学与工程技术学院,广西南宁530004

2.广西大学物理科学与工程技术学院,广西南宁530004

3.广西大学物理科学与工程技术学院,广西南宁530004

4.广西大学物理科学与工程技术学院,广西南宁530004

5.广西大学物理科学与工程技术学院,广西南宁530004

基金项目: 国家自然科学基金(50D61001;5066001) 广西科学基金(桂科自0832029;桂科基0342004-1;0639004)

关键词： Monte-Carlo方法 , 钪 , 硅 , 铝铜镁合金 , 稀土

Effect of Scandium and Silicon on Microstructural Evolution of Al-Mg-Cu Alloys

运用蒙特卡罗方法计算模拟了加人微合金元素Sc,Si对Al-Cu-Mg合金时效初期微结构的演化过程的影响.模拟结果表明:在温度为453 K时,加入微量Si使合金的Mg原子逐步向Si原子偏聚;单独添加微量Sc以后,则抑制了合金中Cu原子的团簇化,使得Cu原子转向Mg原子偏聚;在同时添加Sc和Si的合金中出现了Sc/Cu/Si/Mg/空位团多元复合体.研究表明空位在微结构演化过程中对形成原子偏聚团起重要作用.

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材料期刊网

钪,硅对Al-Mg-Cu合金时效初期微结构演化的作用

Effect of Scandium and Silicon on Microstructural Evolution of Al-Mg-Cu Alloys

参考文献