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Basal shearing of twinned stacking faults and its effect on mechanical properties in an Mg-Zn-Y alloy with LPSO phase
Shao, X. H.1,2; Jin, Q. Q.1; Zhou, Y. T.1; Yang, H. J.3; Zheng, S. J.1; Zhang, B.1; Chen, Q.2; Ma, X. L.1,4
Corresponding AuthorMa, X. L.(xlma@imr.ac.cn)
2020-03-27
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume779Pages:8
AbstractThe precipitates inside deformation twins may block the dislocation motion and consequently affect the mechanical property of materials. Herein, at the atomic level, we directly visualize that the basal dislocation slips shear the twinned stacking faults (TSFs) within the deformation twins in an Mg-Zn-Y alloy containing long-period stacking ordered (LPSO) structures. The TSFs, enriched with solute atoms, could be considered as precipitates inside deformation twins. They are sheared by a single step or multiple shearing steps on the basal plane. The microstructural fingerprints, i.e., the width of basal shearing steps, enable a quantitative assessment of the local and total plastic shear strain due to the basal dislocation within the deformation twins. The TSFs can block dislocation slip, while the dislocation shearing induces large lattice distortion and even solute atoms redistribution at local intersection. The TSFs-dislocation interaction is expected to lower the basal dislocation motion and resultantly modulate the mechanical properties of magnesium alloys. These results may offer a novel strategy for strengthening and toughening magnesium alloys via tailoring the shearable precipitates.
KeywordMagnesium alloy Long-period stacking ordered phase Deformation twin Stacking fault Shearable precipitate
Funding OrganizationNational Natural Science Foundation of China ; Fund of SYNL ; JSPS Postdoctoral Fellowship for Overseas Researchers
DOI10.1016/j.msea.2020.139109
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51871222] ; National Natural Science Foundation of China[51801214] ; National Natural Science Foundation of China[51975552] ; Fund of SYNL[2015FP18] ; Fund of SYNL[2017FP16] ; JSPS Postdoctoral Fellowship for Overseas Researchers[P17732]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000524354800003
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/138323
Collection中国科学院金属研究所
Corresponding AuthorMa, X. L.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Kyushu Univ, Dept Mech Engn, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan
3.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
4.Lanzhou Univ Technol, Sch Mat Sci & Engn, 287 Langongping Rd, Lanzhou 730050, Peoples R China
Recommended Citation
GB/T 7714
Shao, X. H.,Jin, Q. Q.,Zhou, Y. T.,et al. Basal shearing of twinned stacking faults and its effect on mechanical properties in an Mg-Zn-Y alloy with LPSO phase[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,779:8.
APA Shao, X. H..,Jin, Q. Q..,Zhou, Y. T..,Yang, H. J..,Zheng, S. J..,...&Ma, X. L..(2020).Basal shearing of twinned stacking faults and its effect on mechanical properties in an Mg-Zn-Y alloy with LPSO phase.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,779,8.
MLA Shao, X. H.,et al."Basal shearing of twinned stacking faults and its effect on mechanical properties in an Mg-Zn-Y alloy with LPSO phase".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 779(2020):8.
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