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

doi:10.1016/j.jallcom.2022.164219

IMR OpenIR

	Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation
	Wang, Weizhen 1,2; Zhang, Mengmeng 1,2; Yang, Zhuoqun 3; Hu, Weiwei 1
通讯作者	Wang, Weizhen(wzwang14s@imr.ac.cn)
	2022-06-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	905 页码:12
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.
关键词	Dynamic precipitation Dislocation Heterogeneous nucleation Strengthening Mg alloys
资助者	National Natural Science Foundation of China ; Basic and Applied Basic Research Major Programme of Guangdong Province, China
DOI	10.1016/j.jallcom.2022.164219
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000779143800002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：10[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/321006/172855
专题	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.Ji Hua Lab, Foshan 528200, Peoples R China 3.Rosedale Acad, Markham, ON L3R 6G2, Canada
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.