Influence of the Al2Ca phase on microstructure and mechanical properties of Mg–Al–Ca alloys

Jiang, Zhongtao; Jiang, Bin; Hong, Yang; Yang, Qingshan; Dai, Jiahong; Pan, Fusheng

doi:10.1016/j.jallcom.2015.06.060

Cited by 94 publications

(31 citation statements)

References 28 publications

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“…Based on the EDS results, main phases in AZX310 Mg alloys are Al–Ca compounds. It has been concluded that the type of phases in Mg–Al–Ca systems was controlled by the ratio of Ca/Al . The ratio of Ca/Al is around 0.13 in this study which indicates the Al–Ca phases had greater possibility to be Al 2 Ca.…”

Section: Resultssupporting

confidence: 47%

Tailoring the Rolling Texture of AZ31 Mg Alloy with Calcium and Tin Addition

et al. 2019

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A small amount of Ca and Sn is added into AZ31 alloy separately to modify its deformation behavior and optimized rolling texture. Results show that addition of Sn increases the activation of twinning in AZ31. Some unusual double twins, inducing {101¯2}‐true{10true1¯2true} and {101¯3}‐true{10true1¯2true} double twins, are activated in AZ31–0.5Sn alloy. Refined grains with similar orientation as their parents are produced by continuous static recrystallization, which limits texture modification in AZT310. Ca gives rise to a remarkable grain refinement during hot rolling. Recrystallized grains in AZX310 exhibit a weaker double peak texture with a wide orientation spread. It is found that Al2Ca particles simulate recrystallized nucleation and some of these refined grains exhibit non‐basal orientations. Primary compression twins are favorable nucleation sites for recrystallization and they are more effective in texture modification compared to other double twins.

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Section: Resultssupporting

confidence: 47%

Tailoring the Rolling Texture of AZ31 Mg Alloy with Calcium and Tin Addition

et al. 2019

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“…Similarly, the difference in electronegativity between Al and Ca is 0.5, while that between Mg and Ca is 0.21; thus, it is obvious that Al reacts with Ca more likely than Mg. Thus, Al2Ca forms more easily in alloys containing Ca [11]. The XRD patterns of the extruded Mg-7Li-3Al-xCa alloys are presented in Figure 3.…”

Section: Microstructurementioning

confidence: 99%

“…Some studies showed that Al can improve the mechanical properties of Mg-Li alloys owing to the formation of intermetallic compounds and a favorable solid-solution strengthening effect [10][11][12][13][14]. Bahman et al [15] reported that more than 3 wt.% addition of Al dramatically degraded the corrosion resistance of Mg-Al-Zn-Ca alloys due to the formation of a Mg 17 Al 12 network at the grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ca Content on the Mechanical Properties and Corrosion Behaviors of Extruded Mg–7Li–3Al Alloys

Xiong

Yang

Deng

et al. 2019

Metals

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The effect of Ca addition on the microstructure, mechanical properties, and corrosion behaviors of the extruded Mg–7Li–3Al alloys was investigated. The results showed that the extruded Mg–7Li–3Al–xCa alloys consisted of α-Mg (hcp) + β-Li (bcc) matrix phases and Al2Ca. With increasing Ca content, the amount and morphology of the Al2Ca phase changed significantly. The grains of the extruded Mg–7Li–3Al–xCa alloys were refined by dynamic recrystallization during the extrusion process. The tensile tests results indicated that the extruded Mg–7Li–3Al–0.4Ca alloy exhibited favorable comprehensive mechanical properties; its ultimate tensile strength was 286 MPa, the yield strength was 249 MPa, and the elongation was 18.7%. The corrosion results showed that this alloy with 0.4 wt.% Ca addition exhibited superior corrosion resistance, with a corrosion potential Ecorr of −1.48742 VVSE, attributed to the formation of protective Al2Ca phases.

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“…However, rare earth elements are not available for mass‐produced components in automobile and transportation due to its high cost . Therefore, it is of practical significance to develop low‐cost ultrahigh strength magnesium alloys with lower content or without RE elements . Ca, a low cost alloying element, was found to improve high temperature properties of Mg‐Al‐Mn alloys, because the addition of Ca can effectively prevent the formation of β‐Mg 17 Al 12 phase and induce the thermally stable (Mg,Al) 2 Ca phases with high‐melting point .…”

Section: Introductionmentioning

confidence: 99%

Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

Chen

Abel

Cramer

et al. 2018

Materials & Corrosion

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To develop low‐cost and ultrahigh strength magnesium alloys, AE42 (Mg‐4Al‐2RE) alloy is modified by adding Ca (Mg‐4Al‐0.5RE (RE = Y, Ce)‐xCa (x = 0.3, 0.8, and 1.5)) to replace the majority of rare earth elements. The microstructures of squeeze‐cast AE42 and Mg‐4Al‐0.5RE‐xCa alloys are investigated by XRD, EPMA, and SEM, respectively. The corrosion behaviors of all alloys are studied by gravimetric measurements and electrochemical tests. Results show that the microstructure difference between AE42 and Mg‐4Al‐0.5RE‐xCa alloys is that with the addition of Ca, dendritic and acicular Al‐RE phases are suppressed and thin acicular Al2Ca or bone‐shaped (Mg, Al)2Ca phases are formed. Because the reduction of Al‐RE phases can decrease the number of cathode and the Ca‐containing phases have lower potential, the corrosion resistance of Mg‐Al‐0.5RE‐xCa alloys is significantly better than that of AE42 alloy. The alloy with 0.8 wt% Ca addition shows the best corrosion resistance, which can be attributed to the effect of mixed oxide film of RE and Ca and moderate Al2Ca phase discontinuously distributed on the grain boundaries.

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Influence of the Al2Ca phase on microstructure and mechanical properties of Mg–Al–Ca alloys

Cited by 94 publications

References 28 publications

Tailoring the Rolling Texture of AZ31 Mg Alloy with Calcium and Tin Addition

Tailoring the Rolling Texture of AZ31 Mg Alloy with Calcium and Tin Addition

Effect of Ca Content on the Mechanical Properties and Corrosion Behaviors of Extruded Mg–7Li–3Al Alloys

Microstructures and corrosion behaviors of squeeze‐cast Mg‐4Al‐2RE and Mg‐4Al‐0.5RE‐xCa (x = 0.3, 0.8, and 1.5) alloys

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