Behavior of surface oxidation on molten Mg–9Al–0.5Zn–0.3Be alloy

Zeng, Xiaoqin; Wang, Qudong; Lu, Yingjie; Ding, Wenjiang; Zhu, Yanping; Zhai, Chao; Chen, Lu; Xu, Xiaoping

doi:10.1016/s0921-5093(00)01798-6

Cited by 81 publications

(40 citation statements)

References 9 publications

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“…Huang et al [165] reported an increase of 200 C in the ignition temperature of a Mg-2Ca alloy after alloying with 300 ppm (wt) Be. Zeng et al [166,167] reported that 0.3 wt.% Be-containing AZB910 could be melted without burning, even without a shielding gas. Fig.…”

Section: Bementioning

confidence: 99%

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Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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Highlights The oxidation behaviours of Mg alloys from low to high temperatures are reviewed. Characteristics of MgO during oxidation is discussed. Mechanisms of Mg oxidation is presented. Effect of various alloying elements is analysed. AbstractThis paper reviews (i) the oxidation of Mg alloys at elevated temperatures in air; (ii) the influence of alloying elements on the oxidation of Mg alloys; and (iii) the progress in the development of oxidation-resistant Mg alloys. Low oxidation rates have been shown by Mg alloys containing the alloying elements, Ca, Be and rare earth elements. However, these alloying elements may also decrease mechanical properties, such as ductility.

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Section: Bementioning

confidence: 99%

“…Through XRD and AES analysis, Zeng [166] Zeng et al [167] also compared the oxidation resistance AZ91 containing 0.3 wt.% Be with AZ91 containing 5 ppm (wt) Be, and found that AZ91-5 ppm (wt) Be showed rapid oxidation at 650 C. This implies effective protection of the Mg alloy requires a considerable amount of Be.…”

Section: Bementioning

confidence: 99%

Oxidation of magnesium alloys at elevated temperatures in air: A review

et al. 2016

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“…Spinel has a low free energy so that is often forms at the interface of the matrix and magnesia or intermetallic compound. 1,[4][5][6] These oxide films can also serve as nucleation sites for the formation of pores or inclusions in cast magnesium alloys, which of cause accelerates fatigue crack propagation eventually leading to fatigue failure. 7) In other words an oxide film is extremely harmful to the quality of cast magnesium.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis and Analysis of Oxide Films in Cast Magnesium Alloys by Ultrasonic-Vibration Treatment

Chen

Wei

2007

Mater. Trans.

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Magnesium alloys with low density are important light metals, widely used in the aerospace and automotive industries and in the manufacture of communication devices, consumer-electronics appliances and computers products in recent years. However magnesium and magnesium alloys are the most reactive metals so that oxide films easily form on them during the melting or pouring process. These films are difficult to observe by optical micrograph. In this study we propose a simple method to observe oxide films entrapped in cast magnesium alloys. The oxide films are fractured as a result of cavitation erosion on the sample surface that occurs during ultrasonic-vibration treatment. The eroded areas become visible as differently shaped foggy marks. This method of observing and identifying foggy marks is shown to be useful in the diagnosis of oxide films in cast magnesium alloys. In addition, the presented method in the diagnosis of oxide films that formed on magnesium and aluminum alloys are also compared.

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“…The MgO scale was certainly not compact with a Pilling-Bedworth ratio of 0.81, and as such, oxygen penetrates through the loose oxide layer. The heat of formation of MgO is such that local areas are heated to considerably high temperatures that can accelerate oxidation to the point of ignition or burning [10,11]. Figure 4 shows the ignition curves of the 4 Ignition test graphs of the AM60B alloy and the SiC p / AM60B composite in air AM60B alloy and SiC p /AM60B composite wherein the ignition temperature for AM60B was 525 and 603°C for SiC p /AM60B.…”

Section: Resultsmentioning

confidence: 99%

Oxidation of AM60B Mg Alloys Containing Dispersed SiC Particles in Air at Temperatures Between 400 and 550 °C

Nguyen

Lee

2009

Oxid Met

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AM60B magnesium alloys, with and without dispersed SiC particles, were oxidized between 400 and 550°C in air. The scales generated consisted primarily of MgO and a small amount of Mg 3 N 2 formed by the outward diffusion of cations (Mg, Al, Mn) and the inward diffusion of anions (N, O). The SiC particles were stable in the AM60B alloy during oxidation and increased its oxidation resistance to a certain extent. However, given the predominance of the non-protective MgO as the main oxide, the SiC p /AM60B composites were inevitably destroyed as oxidation progressed.

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Behavior of surface oxidation on molten Mg–9Al–0.5Zn–0.3Be alloy

Cited by 81 publications

References 9 publications

Oxidation of magnesium alloys at elevated temperatures in air: A review

Oxidation of magnesium alloys at elevated temperatures in air: A review

Diagnosis and Analysis of Oxide Films in Cast Magnesium Alloys by Ultrasonic-Vibration Treatment

Oxidation of AM60B Mg Alloys Containing Dispersed SiC Particles in Air at Temperatures Between 400 and 550 °C

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