Effects of Ce on damping capacity of AZ91D magnesium alloy^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：黄正华 郭学锋 张忠明

文章页码：311 - 315

Key words：damping capacity; damping mechanism; AZ91D alloy; Ce modification

Abstract: The microstructures and damping capacity of AZ91D cast alloys containing various Ce contents were investigated. Damping capacity (Q^-1) of the alloys was measured by cantilever beam technique, and the relationship between damping capacity and strain amplitude was investigated. The results show that Al₄Ce phase is formed in AZ91D alloy after adding a certain quantity of Ce contents, then as-cast microstructures of the alloys are refined. Meanwhile the damping capacity of the alloys is also improved. When the mass fraction of Ce is 0.7%, the most obvious refinement effect and the maximum damping capacity can be obtained. When the damping capacity (Q^-1) is 2.728×10^-3, 61% increment can be obtained compared with unmodified AZ91D alloy. The damping capacity of the alloys is relative to strain amplitude,and the damping behavior can be explained by the theory of Granato and Lücke.

基金信息：the National Natural Science Foundation of China