Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation

doi:10.1016/j.jallcom.2022.164219

CORC > 金属研究所 > 中国科学院金属研究所

	Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation
	Wang, Weizhen 1,3; Zhang, Mengmeng 1,3; Yang, Zhuoqun 2; Hu, Weiwei 1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2022-06-05
卷号	905 页码:12
关键词	Dynamic precipitation Dislocation Heterogeneous nucleation Strengthening Mg alloys
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2022.164219
通讯作者	Wang, Weizhen(wzwang14s@imr.ac.cn)
英文摘要	Dynamic precipitation and microstructural evolution during hot deformation in a Mg-Zn-Gd alloy were investigated through systematic microstructural characterizations. Fast dynamic precipitation of beta'-Mg7Gd rods was activated along dislocations during plastic deformation in Mg97Zn1Gd2 samples annealed at 773 K for 10 h. Transformation of Mg3GdZn to 14H long-period stacking ordered (LPSO) phase increased solute concentration in Mg matrix by ~50% after annealing, which perhaps play an important role in activating dynamic precipitation during subsequent hot deformation, besides assistance of heterogeneous nucleation along dislocations. However, dislocations in cold deformed samples would dissociate upon subsequent annealing at 573 K, producing stacking faults with Suzuki segregation of both Zn and Gd, instead of activating fast precipitation of beta'-Mg7Gd rods. Moving dislocations may attract Gd atoms near their slip planes during hot deformation, which is critical for producing local compositional fluctuation high enough to facilitate dynamic precipitation of beta'-Mg7Gd. Both the formation of H-14 LPSO and dynamic precipitation of beta'-Mg7Gd should play a role in strengthening the Mg97Zn1Gd2 alloy. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51971225] ; National Natural Science Foundation of China[52001225] ; National Natural Science Foundation of China[X210141TL210] ; Basic and Applied Basic Research Major Programme of Guangdong Province, China[2021B03010300 03]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000779143800002
资助机构	National Natural Science Foundation of China ; Basic and Applied Basic Research Major Programme of Guangdong Province, China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172854]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Weizhen
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Rosedale Acad, Markham, ON L3R 6G2, Canada 3.Ji Hua Lab, Foshan 528200, Peoples R China
推荐引用方式 GB/T 7714	Wang, Weizhen,Zhang, Mengmeng,Yang, Zhuoqun,et al. Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2022,905:12.
APA	Wang, Weizhen,Zhang, Mengmeng,Yang, Zhuoqun,&Hu, Weiwei.(2022).Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation.JOURNAL OF ALLOYS AND COMPOUNDS,905,12.
MLA	Wang, Weizhen,et al."Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation".JOURNAL OF ALLOYS AND COMPOUNDS 905(2022):12.