Microstructure, electromagnetic shielding effectiveness and mechanical properties of Mg–Zn–Cu–Zr alloys

Abstract 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 (δ = 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.

[1]  F. Ko,et al.  Electromagnetic interference shielding effectiveness of hybrid multifunctional Fe3O4/carbon nanofiber composite , 2014 .

[2]  Qiang Zhang,et al.  Microstructure evolution process of Ferro-Aluminum based sandwich composite for electromagnetic shielding. , 2014, Micron.

[3]  F. Pan,et al.  High conductivity and high strength Mg–Zn–Cu alloy , 2014 .

[4]  Hongqiang Zhu,et al.  Effects of Cu addition on microstructure and mechanical properties of as-cast magnesium alloy ZK60 , 2014 .

[5]  Daokui Xu,et al.  Effect of microstructure and texture on the mechanical properties of the as-extruded Mg–Zn–Y–Zr alloys , 2007 .

[6]  F. Pan,et al.  Microstructure, electromagnetic shielding effectiveness and mechanical properties of Mg–Zn–Y–Zr alloys , 2015 .

[7]  F. Pan,et al.  Enhanced electromagnetic interference shielding in ZK60 magnesium alloy by aging precipitation , 2013 .

[8]  K. Lu,et al.  Electro-healing cracks in nickel , 2013 .

[9]  Gaohui Wu,et al.  Electromagnetic interfering shielding of aluminum alloy–cenospheres composite , 2007 .

[10]  Davide Micheli,et al.  Nanostructured composite materials for electromagnetic interference shielding applications , 2011 .

[11]  W. Hsu,et al.  Investigation of the electric conductivity and the electromagnetic interference shielding efficiency of SWCNTs/GNS/PAni nanocomposites , 2011 .

[12]  T. Ohkubo,et al.  Natural Aging in Mg-Zn(-Cu) Alloys , 2008 .

[13]  Bin Wang,et al.  Effects of Nd on microstructures and properties of extruded Mg–2Zn–0.46Y–xNd alloys for stent application , 2011 .

[14]  T. Konno,et al.  Grain refinement and texture evolution in AZ31 Mg alloys sheet processed by differential speed rolling , 2009 .

[15]  Jun Cai,et al.  Fabrication and electromagnetic interference shielding effectiveness of polymeric composites filled with silver-coated microorganism cells , 2014 .

[16]  K. Liew,et al.  Design of artificial nacre-like hybrid films as shielding to mitigate electromagnetic pollution , 2014 .

[17]  Mohammed H Al-Saleh,et al.  Microstructure, electrical, and electromagnetic interference shielding properties of carbon nanotube/acrylonitrile–butadiene–styrene nanocomposites , 2012 .

[18]  D. Chung.  Electromagnetic interference shielding effectiveness of carbon materials , 2001 .

[19]  Sung Hyuk Park,et al.  Effects of cerium addition on the microstructure, mechanical properties and hot workability of ZK60 alloy , 2013 .

[20]  Y. Huang,et al.  A conventional thermo-mechanical process of Al–Cu–Mg alloy for increasing ductility while maintaining high strength , 2011 .

[21]  S. Ringer,et al.  Microstructure and mechanical properties of Mg–6Zn–xCu–0.6Zr (wt.%) alloys , 2011 .

[22]  Zhi-hua Zhang,et al.  Effect of heat treatment on electromagnetic shielding effectiveness of ZK60 magnesium alloy , 2012 .

[23]  Xiaolan Han,et al.  Influence of Cu on microstructure and tensile properties of 7XXX series aluminum alloy , 2015 .

[24]  Alan A. Luo,et al.  Magnesium casting technology for structural applications , 2013 .

[25]  Guohua Wu,et al.  Effects of chemical composition on the microstructure and mechanical properties of gravity cast Mg–xZn–yRE–Zr alloy , 2014 .

[26]  A. Tang,et al.  The effect of addition of Nd and Ce on the microstructure and mechanical properties of ZM21 Mg alloy , 2013 .