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微量稀土Y对高纯铝织构的影响

Keywords: 高纯铝,冷轧织构,立方织构,晶体取向分布函数

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Abstract:

采用晶体取向分布函数(ODF)法研究和分析了在高纯铝中加入微量稀土Y对冷轧形变织构和再结晶立方织构的影响.结果表明:在高纯铝中添加微量Y,可提高铝箔中再结晶立方结构的成分,当w(Y)为0.0015%时,立方织构很强;但Y添加量的变化不改变冷轧织构类型.作用机理是微量稀土Y与高纯铝中杂质元素可形成FeYAl8、Fe6YAl6、Fe4YAl8、Si1YAl2、Si2YAl2及Cu4YAl8等化合物,这些化合物的形成能净化基体,退火时有效消除了杂质元素,特别是Fe对立方晶核形成和长大的阻碍作用,从而可提高再结晶立方织构成分.

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