The oxidation behavior of stir-cast and heat-treated EV31A at high temperatures in an air atmosphere

被引：8
|
作者：
Somasundaram, M. [1 ]
NarendraKumar, Uttamchand [1 ]
Annamalai, A. Raja [2 ]
机构：
[1] Vellore Inst Technol, Sch Mech Engn, Dept Mfg Engn, Vellore 632014, Tamilnadu, India
[2] Vellore Inst Technol, Ctr Innovat Mfg Res, Vellore 632014, Tamilnadu, India
来源：
CORROSION SCIENCE | 2023年 / 211卷
关键词：
Magnesium alloy; Rare Earth Elements; High -temperature oxidation; Isothermal condition; MG-ND ALLOYS; MAGNESIUM; MICROSTRUCTURE;
D O I：
10.1016/j.corsci.2022.110894
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This study examines the influence of heat treatment techniques on the oxidation behavior of stir-cast EV31A magnesium alloy. The oxidation behavior of the alloy was examined under isothermal conditions at three different temperatures: 390 degrees C, 455 degrees C, and 520 degrees C, by evaluating its weight change. Before and after oxidation, FE-SEM with EDS and XRD were used to detect the alloy's shape, composition, and phases. In contrast to heat -treated alloy, the as-cast material oxidizes quickly. The oxidation behavior of EV31A follows linear kinetics. It creates a dense oxide layer with a thickness of 17.97 mu m, which may be resistant to further oxidation. At 520 degrees C, the oxidation behavior of EV31A changed. The oxidation rate of the as-cast alloy is greater than that of the heat -treated alloy. The formation of dual phase of MgO - Nd2O3 on the surface is noticeable. It confirms that the intermetallic phases significantly modify the oxidation behavior.
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收藏
页数：9
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