Relationship between age-hardening by continuous precipitation and damping capacity in AZ91 alloy

被引：4
|
作者：
Han, Jin-Gu [1 ]
Jun, Joong-Hwan [1 ]
机构：
[1] Korea Inst Ind Technol, Adv Proc & Mat R&D Grp, Incheon, South Korea
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 03期
关键词：
Damping capacity; AZ91; age-hardening; continuous precipitates; Granato-Lucke (G-L) theory; BINARY MG-AL; DISCONTINUOUS PRECIPITATION; MAGNESIUM; DEPENDENCE; EXTENSION;
D O I：
10.1080/02670836.2019.1705589
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The strain-amplitude-dependent and strain-amplitude-independent damping capacities of a cast AZ91 magnesium alloy as functions of its age-hardening response induced by continuous precipitation have been investigated. The damping capacities of the AZ91 alloy exhibited a decreasing tendency in the order of solutionised, underaged, overaged, and peak aged states in the strain-amplitude-dependent region, whereas they increased continuously with aging time in the strain-amplitude-independent region. In view of the microstructural evolution during aging, the lower Al concentration in the alpha-(Mg) matrix and the lower number density of continuous precipitates are thought to be responsible for the better damping capacities of the AZ91 alloy in the strain-amplitude-independent and strain-amplitude-dependent regions, respectively.
引用
收藏
页码：375 / 379
页数：5
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