Effect of minor Gd addition on microstructure, mechanical performance, and corrosion behavior of Mg–Y–Gd alloys
Wenjun Ci, Lili Deng, Xianhua Chen, Xu Dai, Feng Li, Chen Wen, Jingying Bai, Fusheng Pan
Abstract
Effects of minor Gd addition on the micro-structure, mechanical performance, and corrosion behavior of Mg-1Y alloys were systematically studied. With the addition of increased Gd content, the hydrogen evolution rate of Mg-Y-Gd alloys decreased from 2.0 to 0.5 mm/y. Moreover, the alloying Gd in Mg-Y-Gd alloys leaded to the transformation of the active Mg24Y5 phase into the Mg5(GdY) phase. The high corrosion resistance of Mg-1Y-0.6Gd alloy can be attributed to the fine grain size, uniform distribution of surface potential, and the formation of protective corrosion passivation film rich in Gd2O3 and Y2O3.
Topics & Concepts
Materials scienceMicrostructurePassivationCorrosionAlloyMetallurgyPhase (matter)Grain sizeChemical engineeringComposite materialOrganic chemistryChemistryLayer (electronics)EngineeringMagnesium Alloys: Properties and ApplicationsAluminum Alloys Composites PropertiesHydrogen Storage and Materials