Optimizing corrosion resistance of the Mg-4Zn-0.5Y-0.5Nd alloy by regulation of secondary phase and grain structure

doi:10.1016/j.jmrt.2025.01.062

IMR OpenIR

	Optimizing corrosion resistance of the Mg-4Zn-0.5Y-0.5Nd alloy by regulation of secondary phase and grain structure
	Zhao, C. C.1,2; Ouyang, W. T.3; Wen, M.1,2; Yang, C.4; Xu, D. K.5; Zheng, Y. F.2; Xi, T. F.1; Sheng, L. Y.1,2
通讯作者	Yang, C.(chaoyang0315@163.com) ; Sheng, L. Y.(lysheng@yeah.net)
	2025-03-01
发表期刊	JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
ISSN	2238-7854
卷号	35 页码:435-450
摘要	The Mg-4Zn-0.5Y-0.5Nd alloy was designed and fabricated using conventional casting and subsequently heat treatment to optimize its microstructure and corrosion properties. The effects of secondary phase morphology and grain structure on the in vitro corrosion behavior of the alloy were systematically investigated to elucidate the corresponding mechanisms. The results show that the T4 treatment coarsens the equiaxed grains and transforms the secondary phase into thin cell skeleton structure with a slight decrease in area fraction. While the T6 treatment reconstructs the secondary phase into bulk ones along the grain boundary and fine ones inside the grain. The T4 treatment changes the corrosion potential and current density of the alloy obviously, but these values are changed by the T6 treatment a little. The As-C alloy has the highest corrosion rate of 0.91 mg cm- 2 d- 1, while the T4 alloy with solid solution treatment decreases to 0.65 mg cm- 2 d- 1, and the T6 alloy has a middle value between them. Such a corrosion behavior should be mainly ascribed to the evolution of secondary phase morphology and distribution caused by heat treatment. The Mg-Zn-Y-Nd alloys with different states all experience passivation, pitting corrosion, galvanic corrosion, localized corrosion, and extensive corrosion stages, but the duration time of different stages of different alloys differs obviously, which is mainly determined by the secondary phase morphology. Comparatively, the secondary phase with thin cell skeleton structure contributes to corrosion resistance, while the isolated bulk secondary phase accelerates the corrosion. Moreover, the appropriate coarsened grain structure is also beneficial to corrosion resistance.
关键词	Mg-Zn-Y-Nd alloy Heat treatment Microstructure Secondary phase Corrosion behavior
资助者	Shenzhen Basic Research Projects ; IER foundation ; National Natural Science Foundation of China ; Postdoctoral Fellowship Program of CPSF ; China Postdoctoral Science Foundation ; Shanghai Post-doctoral Excellence Program
DOI	10.1016/j.jmrt.2025.01.062
收录类别	SCI
语种	英语
资助项目	Shenzhen Basic Research Projects[JCYJ20210324120001003] ; Shenzhen Basic Research Projects[JCYJ20220531091802006] ; IER foundation[IERF202201] ; IER foundation[IERF202202] ; IER foundation[IERF202102] ; National Natural Science Foundation of China[52401101] ; Postdoctoral Fellowship Program of CPSF[GZC20231545] ; China Postdoctoral Science Foundation[2024T170557] ; China Postdoctoral Science Foundation[2023M742224] ; Shanghai Post-doctoral Excellence Program[2023440]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001398879800001
出版者	ELSEVIER
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180185
专题	中国科学院金属研究所
通讯作者	Yang, C.; Sheng, L. Y.
作者单位	1.PKU HKUST Shenzhen Hongkong Inst, Shenzhen 518057, Peoples R China 2.Peking Univ, Shenzhen Inst, Shenzhen 518057, Peoples R China 3.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China 4.Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China 5.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, C. C.,Ouyang, W. T.,Wen, M.,et al. Optimizing corrosion resistance of the Mg-4Zn-0.5Y-0.5Nd alloy by regulation of secondary phase and grain structure[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,35:435-450.
APA	Zhao, C. C..,Ouyang, W. T..,Wen, M..,Yang, C..,Xu, D. K..,...&Sheng, L. Y..(2025).Optimizing corrosion resistance of the Mg-4Zn-0.5Y-0.5Nd alloy by regulation of secondary phase and grain structure.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,35,435-450.
MLA	Zhao, C. C.,et al."Optimizing corrosion resistance of the Mg-4Zn-0.5Y-0.5Nd alloy by regulation of secondary phase and grain structure".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35(2025):435-450.