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Atomic-scale segregations at the deformation-induced symmetrical boundary in an Mg-Zn-Y alloy
Shao, XH; Peng, ZZ; Jin, QQ; Ma, XL; Ma, XL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
2016-10-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume118Pages:177-186
AbstractSolute atoms segregation to the interfaces, such as grain boundary or twin boundary, often plays a critical role in modulating the properties of a metallic alloy. Deformation induced segregation to the interfaces has been a subject of significant research, since this is one of the key issues to fully understand the deformation mechanism and microstructure evolution in service of engineering materials. By means of the high-resolution aberration-corrected scanning transmission electron microscopy (STEM), we report the investigations of segregations to symmetrical boundaries, kink boundary (KB) and twin boundary (TB), in the Mg-Zn-Y alloys containing long period stacking ordered (LPSO) phases subjected to a compression at room temperature. We found that Zn atoms preferentially segregate to the deformation-induced symmetrical KBs in the LPSO structures and sandwiched Mg layers, while only a small amount of Y atoms concentrate at KB in LPSO structure. These enriched atoms may be in a random distribution, form nanoscale clusters or in a periodic pattern. Furthermore, solute atoms would rather decorate the segment of coherent TBs than enrich the overlapped TBs. Based on the direct atomic observations, the segregation mechanisms to the featured microstructures are proposed. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
description.department[shao, x. h. ; peng, z. z. ; jin, q. q. ; ma, x. l.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [jin, q. q.] univ sci & technol china, sch mat sci & technol, hefei 230026, peoples r china
KeywordMg Alloy Lpso Phases Solute Segregation Deformation Kink Deformation Twin
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51301177]; National Basic Research Program of China [2014CB921002]; Innovation Fund of IMR [SCJJ-2013-PY-08, 2015-PY08]; Fund of SYNL [2015FP18]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76251
Collection中国科学院金属研究所
Corresponding AuthorMa, XL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Shao, XH,Peng, ZZ,Jin, QQ,et al. Atomic-scale segregations at the deformation-induced symmetrical boundary in an Mg-Zn-Y alloy[J]. ACTA MATERIALIA,2016,118:177-186.
APA Shao, XH,Peng, ZZ,Jin, QQ,Ma, XL,&Ma, XL .(2016).Atomic-scale segregations at the deformation-induced symmetrical boundary in an Mg-Zn-Y alloy.ACTA MATERIALIA,118,177-186.
MLA Shao, XH,et al."Atomic-scale segregations at the deformation-induced symmetrical boundary in an Mg-Zn-Y alloy".ACTA MATERIALIA 118(2016):177-186.
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