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Dynamic precipitation and strengthening in a Mg-Zn-Gd alloy during hot deformation
Wang, Weizhen1,2; Zhang, Mengmeng1,2; Yang, Zhuoqun3; Hu, Weiwei1
Corresponding AuthorWang, Weizhen(wzwang14s@imr.ac.cn)
2022-06-05
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume905Pages:12
AbstractDynamic 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.
KeywordDynamic precipitation Dislocation Heterogeneous nucleation Strengthening Mg alloys
Funding OrganizationNational Natural Science Foundation of China ; Basic and Applied Basic Research Major Programme of Guangdong Province, China
DOI10.1016/j.jallcom.2022.164219
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000779143800002
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/172855
Collection中国科学院金属研究所
Corresponding AuthorWang, Weizhen
Affiliation1.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
Recommended Citation
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.
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