Study on Damping Capacities of ZK60-2.8Nd Magnesium Alloy

2nd International Conference on Design, Materials, and Manufacturing

材料科学;机械制造

Liu, X.L.^1 ; Zhang, W.Y.^1 ; Wu, Y.Z.^1

Hunan Institute of Technology, Hunan Hengyang

421002, China^1

关键词: Critical strains;    Damping capacity;    Damping property;    Dislocation densities;    Dynamic Mechanical Thermal Analyzer;    Solution treatments;    Strain ranges;    Strain-dependent;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/220/1/012016/pdf
DOI  :  10.1088/1757-899X/220/1/012016

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Damping properties of ZK60-2.8Nd magnesium alloys as-cast, solution and extrusion were investigated by dynamic mechanical thermal analyzer. The results show that ZK60-2.8Nd magnesium alloy extrusion and solution exhibit almost the same strain independent damping value as that of alloy as-cast, the critical strain amplitude is about 5×10-5. Solution treatment effects the distribution of solution atoms, and dynamic re-crystallization during the hot extrusion increases movable dislocation density ρ, which makes the dislocations easier to move on the basal plane. Within the strain range of 5×10-5≤≤4×10-4, the strain dependent damping value of ZK60-2.8Nd magnesium alloy as-solution is the highest, and that of the alloy as-cast is the least due to the grain sizes increase of the alloy as-solution and dynamic re-crystallization of the alloy as-extrusion leading the increase of movable dislocation density. Within scope of the experiment, the maximum damping value of alloy as-cast, solution and extrusion is 0.03371, 0.01546 and 0.01392, respectively.