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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
发表期刊ACTA MATERIALIA
ISSN1359-6454
卷号118页码:177-186
摘要Solute 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.
部门归属[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
关键词Mg Alloy Lpso Phases Solute Segregation Deformation Kink Deformation Twin
学科领域Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者National 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]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76251
专题中国科学院金属研究所
通讯作者Ma, XL (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
推荐引用方式
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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