Microstructure and mechanical properties of Mg–6Zn–xCu–0.6Zr (wt.%) alloys

Zhu, Hongmei; Sha, Gang; Liu, J.W.; Wu, C.L.; Luo, Cheng; Liu, Z.W.; Zheng, Rongkun; Ringer, Simon P.

doi:10.1016/j.jallcom.2010.12.165

Cited by 47 publications

(25 citation statements)

References 13 publications

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“…Therefore, the modification of the Mg 2 Si is an important requirement. Previous published work on other Mg alloys has demonstrated that the morphology and size of Mg 2 Si can be changed by the addition of different alloying elements [19][20][21][22][23][24]. Our previous research has shown that a proper Ba addition in an in situ synthesized Mg-Zn-Si alloy with a high Si content could effectively modify and refine both the primary and eutectic Mg 2 Si phase [14].…”

Section: Introductionmentioning

confidence: 96%

Effect of Ca on the microstructure and tensile properties of Mg–Zn–Si alloys at ambient and elevated temperature

Cong

Liu

et al. 2012

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 96%

Effect of Ca on the microstructure and tensile properties of Mg–Zn–Si alloys at ambient and elevated temperature

Cong

Liu

et al. 2012

Journal of Alloys and Compounds

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“…On one hand, the addition of Cu can alter the solidus of the alloys, which shortens the solidification time and thus refines the microstructure [17] . On the other hand, the CuMgZn intermetallic compound possesses high melting point and good thermal stability [18] . The CuMgZn phase plays a heterogeneous nucleation substrate role in the process of solidification, which efficiently promotes the formation of crystal nucleus and thus refines grains.…”

Section: As-cast Microstructurementioning

confidence: 99%

Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy

Zhang

Huang

et al. 2017

China Foundry

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F or decades, magnesium alloys have wide applications in the aerospace, transportation and mobile electronics industries due to their advantages such as extremely low density and good damping capacity, high specific strength and stiffness, excellent machinability and good castability [1][2][3][4] . However, commercial magnesium alloys provide limited mechanical properties, which hinder their widespread applications [5] . More particularly, to the best of our knowledge, the Mg-Zn binary alloys possess coarse dendritic microstructures, extensive hot cracking tendency, critical shrinkage cavities and porosities. These drawbacks will significantly worsen the mechanical properties of the alloy [6] . The improvement of mechanical properties is a severe and urgent challenge in magnesium alloys research fields. He et al. [7] found that the mechanical properties of magnesium alloys can be significantly improved via appropriate microalloying due Abstract:The application of Mg-Zn binary alloys is restricted due to their developed dendritic microstructure and poor mechanical properties. In this study, an alloying method was used to improve the mechanical properties of Mg-Zn alloy. The Mg-6Zn magnesium alloys microalloyed with varying Cu content (0, 0.8, 1.5, 2.0 and 2.5wt.%) were fabricated by permanent mould casting, and the effects of Cu content on the microstructure and mechanical properties of as-cast Mg-6Zn alloys were studied using OM, SEM, XRD and tensile tests at room temperature.The obtained results show that the addition of Cu not only can refine the grains effectively, but also can modify the eutectic morphology and improve the mechanical properties of the alloys. The main phases of the studied alloys include α-Mg, MgZn 2 , Mg 2 Cu and CuMgZn. When the content of Cu exceeds 0.8wt.%, Mg 2 Cu phase appears. Meanwhile, the eutectic morphology is modified into dendritic shape or lamellar structure, which has an adverse effect on the tensile properties. Furthermore, among the investigated alloys, the alloy containing 0.8% Cu shows an optimal ultimate tensile strength of 196 MPa, while the alloy with 1.5wt.% Cu obtains an excellent elongation of 7.22%. The experimental alloys under different Cu contents show distinguishing fracture behaviors: the fracture of the alloy with 0.8wt.% Cu reveals a mixed mode of inter-granular and quasi-cleavage, while in other investigated alloys, the fracture behaviors are dominated by cleavage fracture. to grain refinement and microstructure modification in the as-cast condition. In order to improve the microstructure and mechanical properties of Mg-Zn binary alloys, many attempts have been devoted to the research and development of high-performance new Mg-Zn based alloys. For example, Mg-Zn-Zr, Mg-Zn-RE, Mg-Zn-Cu and Mg-Zn-Al-Mn alloy systems have been developed and widely applied for some industrial products. There are some minor alloying element investigations in Mg-Zn binary alloys, for instance, adding Ag, Zr, rare earth (RE) or Cu to the Mg-Zn alloy system [8] . It is noteworthy th...

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“…This reveals the potential of Cu as an alloying element that is also capable of improving the mechanical properties of Mg alloy extrusions. However, most previous studies on Cu-containing Mg-Zn-based alloys have been conducted with a particular emphasis on their mechanical properties and few reports on their corrosion behavior have been made available thus far [6][7][8][9][10]. Since Cu is known to be one of the most harmful elements in terms of the corrosion resistance of Mg [11][12][13][14], investigating the corrosion behavior of the Cu-added Mg-Zn-based alloys and their mechanical properties is necessary.…”

Section: Introductionmentioning

confidence: 99%

Influence of Intermetallic Particles on the Corrosion Properties of Extruded ZK60 Mg Alloy Containing Cu

Baek

Kim

2018

Metals

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The microstructure and corrosion behavior of the extruded ZK60 Mg alloys with different Cu content were comparatively investigated. The ZK60 alloy had a microstructure consisting of α-Mg grains with intermetallic MgZn 2 and Zn 2 Zr 3 particles. The addition of 1 wt % Cu resulted in the additional presence of CuMgZn particles. In a 0.6 M NaCl solution at 25 • C, the corrosion rate of the alloy with the added Cu appeared to be about 16% faster than that of the alloy without the addition of Cu. The factors affecting the degraded corrosion resistance of the Cu-added ZK60 alloy are discussed.

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Microstructure and mechanical properties of Mg–6Zn–xCu–0.6Zr (wt.%) alloys

Cited by 47 publications

References 13 publications

Effect of Ca on the microstructure and tensile properties of Mg–Zn–Si alloys at ambient and elevated temperature

Effect of Ca on the microstructure and tensile properties of Mg–Zn–Si alloys at ambient and elevated temperature

Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy

Influence of Intermetallic Particles on the Corrosion Properties of Extruded ZK60 Mg Alloy Containing Cu

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