Amplitude Dependent Internal Friction in a Mg-Al-Zn Alloy Studied after Thermal and Mechanical Treatment

被引：9
作者：
Trojanova, Zuzanka [1 ]
Lukac, Pavel [1 ]
Dzugan, Jan [2 ]
Halmesova, Kristyna [2 ]
机构：
[1] Charles Univ Prague, Fac Math & Phys, Dept Phys Mat, CR-12116 Prague 2, Czech Republic
[2] COMTES FHT, Prumyslova 996, Dobrany 33441, Czech Republic
来源：
METALS | 2017年 / 7卷 / 10期
关键词：
internal friction; magnesium alloy; thermal cycling; dislocations; twinning; MAGNESIUM ALLOY; DAMPING BEHAVIOR; PLASTIC-DEFORMATION; SOLID-SOLUTIONS; MICROSTRUCTURE; AZ31; EXTRUSION; GRAIN;
D O I：
10.3390/met7100433
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The amplitude-dependent internal friction of continuously-cast and rolled AZ31 magnesium alloy was measured in this study. Samples were annealed and quenched step by step; immediately after the treatment, the amplitude dependence of the logarithmic decrement was measured. Changes in the microstructure due to thermomechanical treatment were reflected in changes in the damping. Internal friction is influenced by the dislocation substructure and its modification due to solute atoms migration, microplastic deformation, and twins' formation. Internal friction in the rolled sheets is affected by the rolling texture.
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页数：13
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