Mg-Li-Al合金的力学性能和阻尼性能

被引:16
作者
马春江
张荻
覃继宁
丁文江
机构
[1] 上海交通大学金属基复合材料国家重点实验室!上海
关键词
Mg-Li-Al合金; 力学性能; 阻尼;
D O I
10.19476/j.ysxb.1004.0609.2000.s1.003
中图分类号
TG113 [金相学(金属的组织与性能)];
学科分类号
080502 ;
摘要
研究了不同锂含量的Mg Li Al合金的力学性能和阻尼性能。结果表明 ,随锂含量的增加 ,Mg Li Al合金的密度和抗拉强度降低、塑性明显提高 ;而Mg Li Al合金的阻尼性能随锂含量的增多和温度的提高而明显增高 ,其中Mg 8Li 1Al合金的室温延伸率为 35% ,室温阻尼性能高达 0 .0 1。Mg 8Li 1Al合金的阻尼明显大于Mg 4Li 1Al合金的阻尼 ,是由于Mg 8Li 1Al合金具有α +β双相共晶混合组织 ,α和β相的相界面在循环载荷下产生微滑移 ,而形成相界阻尼 ;而Mg 4Li 1Al合金中只存在α单相组织。
引用
收藏
页码:10 / 14
页数:5
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