Effects of Rare Earth Additions on the As-Cast Microstructure and the Mechanical Properties of AlZnMgCu Alloy

Wang Daqing  Wang Qingliang

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Effects of Rare Earth Additions on the As-Cast Microstructure and the Mechanical Properties of AlZnMgCu Alloy
Issue S1, Pages: 3-7(1998)
Published： 1998 ，
DOI：

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[1]王大庆,王庆良.稀土对AlZnMgCu合金铸态组织和力学性能影响[J].特种铸造及有色合金,1998(S1):3-7.

Wang Daqing Wang Qingliang. Effects of Rare Earth Additions on the As-Cast Microstructure and the Mechanical Properties of AlZnMgCu Alloy. [J]. Special Casting & Nonferrous Alloys (S1):3-7(1998)
[1]王大庆,王庆良.稀土对AlZnMgCu合金铸态组织和力学性能影响[J].特种铸造及有色合金,1998(S1):3-7. DOI：

Wang Daqing Wang Qingliang. Effects of Rare Earth Additions on the As-Cast Microstructure and the Mechanical Properties of AlZnMgCu Alloy. [J]. Special Casting & Nonferrous Alloys (S1):3-7(1998) DOI：

摘要

研究了单一稀土铈（Ce）、钇（Y）对航空用铝合金AlZnMeCu铸态枝晶组织和力学性能的影响规律。结果表明

稀土元素能有效细化合金的二次枝晶组织

减小最大共晶化合物尺寸。稀土的加入使合金的时效强度、硬度有所下降

但少量稀土可改善合金的冲击韧性。

Abstract

The effects of Ce and Y additions on the as-cast microstructure and the mechanical properties of AlZnMgCu alloy have been investigated. The results show that the arm space of the as-cast secondary dendrite and the dimension of the maximum eutectic compound are decreased with adding Ce and Y. The additions of Ce and Y may reduce the ageing strength and ageing hardness of AlZnMgCu alloy. But a small amount of Ce and Y can effectively improve the alloy’s impact toughness.