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Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy
Liu Y1; Chen XF(陈雪飞)2; Wei K1; Xiao LR1,3; Chen B4; Long HB3; Yu YD5; Hu ZH6; Zhou H1
Source PublicationMATERIALS
2019-04-02
Volume12Issue:8Pages:7
ISSN1996-1944
Abstract

Twinning structures and their interfacial segregation play a key role in strengthening of magnesium alloys. Micro-steps are frequently existed in the incoherent twin boundaries, while the effect of them on interface and interfacial segregation is still not clear. In this work, we performed an atomic-scale microstructure analysis using high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) to explore the effect of micro-steps on twin and its interfacial segregation in Mg-Ag alloy. Diffraction pattern of the incoherent twin shows that the misorientation has a slight tilt of 5 degrees from its theoretical angle of 125 degrees due to the accumulated effects of the micro-steps and their misfit dislocations in twin boundaries. Most of the micro-steps in twin boundary are in the height of respectively, and both of them have two types according to whether there are dislocations on the micro-steps. The twin boundary is interrupted by many micro-steps, which leads to a step-line distributed interfacial segregation. Moreover, the Ag tends to segregate to dislocation cores, which results in the interruption of interfacial segregation at the micro-steps with dislocations.

Keywordmagnesium alloy twinning HAADF-STEM interfacial structure
DOI10.3390/ma12081307
Indexed BySCI ; EI
Language英语
WOS IDWOS:000467767400113
WOS KeywordMECHANICAL-PROPERTIES ; MAGNESIUM ALLOYS ; BOUNDARY ; DEFORMATION ; DISLOCATION ; MICROSTRUCTURE ; EVOLUTION
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding ProjectNational Key R&D Program of China[2017YFA0204403] ; National Natural Science Foundation of China[51601003] ; Fundamental Research Funds for the Central Universities[30918011342]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
Classification二类
Ranking2
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79232
Collection非线性力学国家重点实验室
Corresponding AuthorXiao LR; Zhou H
Affiliation1.Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nano & Heterogeneous Mat Ctr, Nanjing 210094, Jiangsu, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
3.Beijing Univ Technol, Inst Microstruct & Property Adv Mat, Beijing 100124, Peoples R China
4.ThermoFisher Sci, Shanghai Nanoport, Shanghai 201210, Peoples R China
5.Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Heilongjiang, Peoples R China
6.Pangang Grp Res Inst Co Ltd, State Key Lab Vanadium & Titanium Resources Compr, Panzihua 617000, Peoples R China
Recommended Citation
GB/T 7714
Liu Y,Chen XF,Wei K,et al. Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy[J]. MATERIALS,2019,12(8):7.
APA Liu Y.,Chen XF.,Wei K.,Xiao LR.,Chen B.,...&Zhou H.(2019).Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy.MATERIALS,12(8),7.
MLA Liu Y,et al."Effect of Micro-Steps on Twinning and Interfacial Segregation in Mg-Ag Alloy".MATERIALS 12.8(2019):7.
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