Microstructure, electromagnetic shielding effectiveness and mechanical properties of Mg-Zn-Cu-Zr alloys
Microstructure, electromagnetic shielding effectiveness and mechanical properties of Mg-Zn-Cu-Zr alloys
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DOI：
10.1016/j.mseb.2015.03.012
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发表时间：
2015-07-01
影响因子：
3.6
通讯作者：
Yan, Tao
中科院分区：
文献类型：
--
作者：
Chen, Xianhua;Liu, Lizi;Yan, Tao
研究了Mg-Zn-xCu-Zr合金（x=0- 2.32wt.%）的显微组织、电磁屏蔽效能和力学性能在本研究中进行了调查。结果表明，Cu的加入导致了MgZnCu相的形成，并导致了晶粒的细化。在挤压状态下，随着Cu含量的增加，EMI SE显著增加。添加2.32 wt.%的合金，Cu表现出最佳的EMI屏蔽能力，SE值为84-117 dB。同时，发现添加低含量的Cu可以获得良好的力学性能。挤出的合金具有0.37重量%的与其他挤压合金相比，Cu呈现出更高的屈服强度（276 MPa）、极限抗拉强度（346 MPa）和伸长率（δ =11.4%）。然而，较高的Cu含量将显著恶化合金的拉伸性能。通过微观组织观察，讨论了电磁屏蔽性能和力学性能的变化规律。(C)2015 Elsevier BM. All rights reserved.
The microstructure, electromagnetic interference (EMI) shielding effectiveness (SE) and mechanical properties of Mg-Zn-xCu-Zr alloys (x=0-2.32 wt.%) were investigated in this study. The results indicated that the addition of Cu led to the formation of MgZnCu phase with a face-center cubic structure, and resulted in grain refinement. EMI SE increased significantly with increasing Cu content in extruded state. The alloy with 2.32 wt.% Cu exhibited optimal EMI shielding capacity with SE value of 84-117 dB. Meanwhile, it was found that good mechanical properties could be achieved by adding low Cu content. The extruded alloy with 0.37 wt.% Cu presented higher yield strength (276 MPa), ultimate tensile strength (346 MPa) and elongation (delta=11.4%) compared with other extruded alloys. However, a higher Cu content would substantially deteriorate tensile properties of the alloys. Based on microstructure observation, the variation of EMI shielding capacity and mechanical properties have been discussed. (C) 2015 Elsevier BM. All rights reserved.