Regulating microstructure and mechanical properties of the as-cast Mg-4Zn-0.5Y-0.5Nd alloy by heat treatment

doi:10.1016/j.jallcom.2024.177232

IMR OpenIR

	Regulating microstructure and mechanical properties of the as-cast Mg-4Zn-0.5Y-0.5Nd alloy by heat treatment
	Zhao, Chaochao 1; Wen, Min 2; Wang, Jian 1; Xu, Daokui 3; Zheng, Yufeng 1; Sheng, Liyuan 1,2
通讯作者	Sheng, Liyuan(lysheng@yeah.net)
	2025-01-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1010 页码:15
摘要	The Mg-4Zn-0.5Y-0.5Nd alloy was designed and fabricated by conventional casting with subsequent heat treatment to regulate the microstructure and mechanical properties. The microstructure, secondary phase, mechanical properties, and fracture behavior were analyzed to elucidate the influencing mechanism. The results reveal that the as-cast alloy is composed of equiaxed grains with large sizes and discontinuously distributed secondary phases. Moreover, the secondary phase is mainly W-Mg3Zn3Y2, which partly forms the eutectic structure. The solid solution treatment coarsens the equiaxed grains and transforms the secondary phase into near continuous distribution. The Mg41Nd5 phase appears and volume fraction of secondary phase decreases a little. The combining of solid solution and aging treatment increases grain size and volume fraction of secondary phase more or less. Furthermore, the Mg24Y5 phase appears and secondary phases have been changed into semi- continuous distribution. After heat treatment, the average grain size reaches its maximum value of 107.18 mu m, and the volume fraction of secondary phase climbs up to 2.73 %. Moreover, the solid solution treatment weakens the crystallographic orientation preference along {0001} but induces diversified crystallographic orientation preference. The heat treatment increases microhardness from 57.2 HV 0.1 of the as-cast state to 70.5 HV 0.1 of the heat-treated state. Comparatively, the solid solution treatment decreases mechanical properties, while the solid solution and aging treatment increase strength and ductility simultaneously. Especially for the ductility, it has been improved by more than 80 %, which is beneficial to the subsequent thermalmechanical processing greatly.
关键词	Mg-Zn-Y-Nd alloy Heat treatment Microstructure Secondary phase Mechanical properties
资助者	Shenzhen Basic Research Projects ; IER foundation
DOI	10.1016/j.jallcom.2024.177232
收录类别	SCI
语种	英语
资助项目	Shenzhen Basic Research Projects[JCYJ20210324120001003] ; Shenzhen Basic Research Projects[JCYJ20200109144608205] ; Shenzhen Basic Research Projects[JCYJ20200109144604020] ; IER foundation[IERF202201] ; IER foundation[IERF202202] ; IER foundation[IERF202102]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001344323300001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：8[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/321006/190965
专题	中国科学院金属研究所
通讯作者	Sheng, Liyuan
作者单位	1.Peking Univ, Shenzhen Inst, Shenzhen 518057, Peoples R China 2.PKU HKUST ShenZhen HongKong Inst, Shenzhen 518057, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Chaochao,Wen, Min,Wang, Jian,et al. Regulating microstructure and mechanical properties of the as-cast Mg-4Zn-0.5Y-0.5Nd alloy by heat treatment[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2025,1010:15.
APA	Zhao, Chaochao,Wen, Min,Wang, Jian,Xu, Daokui,Zheng, Yufeng,&Sheng, Liyuan.(2025).Regulating microstructure and mechanical properties of the as-cast Mg-4Zn-0.5Y-0.5Nd alloy by heat treatment.JOURNAL OF ALLOYS AND COMPOUNDS,1010,15.
MLA	Zhao, Chaochao,et al."Regulating microstructure and mechanical properties of the as-cast Mg-4Zn-0.5Y-0.5Nd alloy by heat treatment".JOURNAL OF ALLOYS AND COMPOUNDS 1010(2025):15.