A Review on Casting Magnesium Alloys: Modification of Commercial Alloys and Development of New Alloys

Pan, Fusheng; Yang, Ming‐Bo; Chen, Xianhua

doi:10.1016/j.jmst.2016.07.001

Cited by 435 publications

(104 citation statements)

References 106 publications

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“…Over the past decade, many investigators have been contributed for the modified-AZ91 alloy by alloying and micro-alloying elements, such as La, Ce, Nd, Y, Ca, B, Sr, Sb, Br, Pr and so on [10]. The results indicate that light rare earth elements (La, Ce and Nd) are more effective than other elements.…”

Section: Introductionmentioning

confidence: 99%

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Cui

et al. 2020

Mater. Res. Express

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The effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91D alloys were investigated. The alloys were produced by casting the molten metal into a preheated steel mould. Microstructures were investigated by XRD and SEM (equipped with EDS). The hardness measurement was carried out by Brinell hardness (HB) digital display tester. Compression tests were conducted at both room and high temperatures (20°C and 150°C). Microstructural characterizations reveal that the area fraction of the β-Mg 17 Al 12 phase changed with the variation of La/Nd ratio. The area fraction of the β-Mg 17 Al 12 phase decrease significantly and then increased slightly with the increase of La/Nd ratio. Besides, the results show that the addition of La and Nd contributed to the formation of needle-like phase Al 11 RE 3 . Meanwhile, the Brinell hardness and high-temperature compression properties of this alloy reach the maximum values (67 HB and 330 MPa, respectively) when the La/Nd ratio is 2/3. In this alloy, the amount of Al 11 RE 3 phase is 51/TA and the average length is 69.55 μm. Moreover, a generation model of Al 11 RE 3 is established and the growth mechanism of Al 11 RE 3 is analyzed. This work thus has proved that La/Nd ratio has a great effect on the microstructure and mechanical properties of AZ91.

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Section: Introductionmentioning

confidence: 99%

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Cui

et al. 2020

Mater. Res. Express

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“…However, to date, the usage of this metal has been restricted to the non-load bearing components such as seat frames and housing parts [2]. Moreover, the dominant manufacturing process is diecasting for its economic benefits [3], whilst casting brings about abundant of defects in the microstructure of alloys like porosities and inclusions, deteriorating its mechanical properties. As a result, wrought Mg alloys are gaining interests to be utilized in vehicles in loadbearing components [4]- [8].…”

Section: Introductionmentioning

confidence: 99%

Fatigue life improvement of cast ZK60 Mg alloy through low temperature closed-die forging for automotive applications

et al. 2018

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Abstract. The influence of low-temperature closed-die forging on the quasi-static and cyclic behaviour of as-cast ZK60 magnesium alloy was investigated. As-cast ZK60 billets were forged at a ram speed of 20 mm/sec and a temperature of 250°C. While the yield strength of the starting alloy was 139 MPa, the forging process improved the yield strength significantly by ~68% to 234 MPa. Moreover, the stresscontrolled push-pull fatigue tests at the stress amplitudes of 140 MPa to 180 MPa revealed that the fatigue life was enhanced by an order of magnitude. Microstructural analyses besides the texture measurements at different locations of the forged part manifested partial grain refinement and texture modification strengthening mechanisms. It is believed that the fatigue life improvement is achieved in the wake of the grain refinement and the subsequent material strengthening.

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“…In recent years, with the increasing demands for light-weighting in the aerospace, high speed train, and automobile industries, magnesium and its alloys have received much attention due to their low density, high specific strength, and excellent damping capacities [1,2]. However, their inherent strengths are relatively lower when compared with steel and aluminum alloys, and lots of effort still need to be made to improve their strengths for broader applications [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Alloying with other elements-for example, Zn, Al, Mn, and so on [1,5]-is an important way to improve the strength of magnesium. The alloying elements can strengthen magnesium alloys by second phase strengthening, solute solution strengthening, and precipitation strengthening [6,7].…”

Section: Introductionmentioning

confidence: 99%

Preparation, Microstructure Evolutions, and Mechanical Property of an Ultra-Fine Grained Mg-10Gd-4Y-1.5Zn-0.5Zr Alloy

Liu

Bai

et al. 2017

Metals

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Abstract:In this work, the microstructural evolutions and mechanical properties of an as-cast Mg-10Gd-4Y-1.5Zn-0.5Zr (wt %) alloy during successive multi-pass equal channel angular pressing (ECAP) were systematically investigated by X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, and compression test. The obtained results show that the microstructure of as-cast alloy consists of α-Mg grains, Mg 3 Gd island phase, few Y-rich particles, and lamellar 14H LPSO (long period stacking ordered) phase located at the grain boundaries. During ECAP, the Mg 3 Gd-type phase is crushed and refined gradually. However, the refined Mg 3 Gd particles are not distributed uniformly in the matrix, but still aggregated at the interdendritic area. The 14H phase becomes kinked during the early passes of ECAP and then broken at the kinking bands with more severe deformation. Dynamic recrystallization of α-Mg is activated during ECAP, and their average diameter decreases to around 1 µm, which is stabilized in spite of increasing ECAP passes. Moreover, nano-scale γ phases were dynamically precipitated in 16p ECAP alloy. Compression tests indicate that 16p ECAP alloy exhibits excellent mechanical property with compressive strength of 548 MPa and fracture strain of 19.1%. The significant improvement for both strength and ductility of deformed alloy could be ascribed to dynamic recrystallization (DRX) grains, refined Mg 3 Gd-type and 14H particles, and dynamically precipitated γ plates.

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A Review on Casting Magnesium Alloys: Modification of Commercial Alloys and Development of New Alloys

Cited by 435 publications

References 106 publications

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Effect of La/Nd ratio on microstructure and mechanical properties of as-cast AZ91-xLa/Nd alloy

Fatigue life improvement of cast ZK60 Mg alloy through low temperature closed-die forging for automotive applications

Preparation, Microstructure Evolutions, and Mechanical Property of an Ultra-Fine Grained Mg-10Gd-4Y-1.5Zn-0.5Zr Alloy

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