夏卿坤,刘志义,刘煜,许晓嫦,刘延斌

• 1:长沙大学机电工程系
• 2:中南大学材料科学与工程学院

摘要(Abstract)：

用原位加热X射线衍射方法测量了固溶态的Al-Cu-Mg-Ag合金在不同温度下的X射线衍射谱,确定不同温度下该合金中存在物相。结果表明:实验合金在145℃以下基本不形成Ag-Mg原子团簇;合金在165～350℃存在Ag-Mg原子团簇,Ag-Mg原子团簇在250～350℃最为明显;合金在400℃时Ag-Mg原子团簇消失。TEM结果表明,165℃时效,合金组织由大量的Ω相和少量的θ′相组成,而在250℃时效,合金组织为Ω相,没有发现θ′相存在。分析表明:高温有助于Ag-Mg原子团簇存在,即高温时效有助于Ω相形核。

关键词(KeyWords)： Al-Cu-Mg-Ag合金;原位X射线衍射;Ω相;沉淀析出

Abstract:

Keywords:

基金项目(Foundation): 国家“973”重点基础研究发展项目(2005CB623705-04)

作者(Author): 夏卿坤,刘志义,刘煜,许晓嫦,刘延斌

DOI: 10.13289/j.issn.1009-6264.2010.03.008

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