Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김진경 | - |
dc.date.accessioned | 2019-03-06T06:57:38Z | - |
dc.date.available | 2019-03-06T06:57:38Z | - |
dc.date.issued | 2016-06 | - |
dc.identifier.citation | ACTA MATERIALIA, v. 112, Page. 171-183 | en_US |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.issn | 1873-2453 | - |
dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S1359645416302725 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/100538 | - |
dc.description.abstract | We present a systematic atomic scale analysis of the structural evolution of long-period-stacking ordered (LPSO) structures in the (i) alpha-Mg matrix and in the (ii) interdendritic LPSO phase of an Mg97Y2Zn1 (at. %) alloy annealed at 500 degrees C, using high resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM). Various types of metastable LPSO building block clusters have been observed in both regions. The thermodynamic phase stabilities computed by density functional -theory calculations explain the diversity of the LPSO structures which are distinguished by their different arrangements of the Y/Zn enriched LPSO building blocks that have a local fcc stacking sequence on the close packed planes. A direct evidence of the transformation from 18R to 14H is presented. This finding suggests that LPSO structures can change their separation distance quantified by the number of alpha-Mg layers between them at a low energy penalty by generating the necessary Shockley partial dislocation on a specific glide plane. Based on our results the most probable transformation sequence of LPSO precipitate plates in the alpha-Mg matrix is: single building block -> various metastable LPSO building block clusters 14H, and the most probable transformation sequence in the interdendritic LPSO phase is: 18R -> various metastable LPSO building block clusters -> 14H. The thermodynamically most stable structures in both the a-Mg matrix and the interdendritic LPSO phase are a mixture of 14H and alpha-Mg. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | en_US |
dc.description.sponsorship | J.K.K. is grateful for the kind support of the Alexander von Humboldt Stiftung (AvH, Alexander von Humboldt Foundation, www.humboldtfoundation.de). The use and operation of the FEI Titan STEM at the Ernst Ruska center was provided by the ER-C project B-080. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | en_US |
dc.subject | Magnesium alloy | en_US |
dc.subject | Long period stacking ordered structure | en_US |
dc.subject | Phase transformation | en_US |
dc.subject | Transmission electron microscopy (TEM) | en_US |
dc.subject | Density functional theory (DFT) | en_US |
dc.title | The role of metastable LPSO building block clusters in phase transformations of an Mg-Y-Zn alloy | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1016/j.actamat.2016.04.016 | - |
dc.relation.journal | ACTA MATERIALIA | - |
dc.contributor.googleauthor | Kim, Jin-Kyung | - |
dc.contributor.googleauthor | Ko, Won-Seok | - |
dc.contributor.googleauthor | Sandloebes, Stefanie | - |
dc.contributor.googleauthor | Heidelmann, Markus | - |
dc.contributor.googleauthor | Grabowski, Blazej | - |
dc.contributor.googleauthor | Raabe, Dierk | - |
dc.relation.code | 2016003144 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING | - |
dc.identifier.pid | jinkyungkim | - |
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