The role of metastable LPSO building block clusters in phase transformations of an Mg-Y-Zn alloy
DC Field | Value | Language |
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dc.contributor.author | Kim, Jin Kyung | - |
dc.contributor.author | Ko, Won Seok | - |
dc.contributor.author | Sandlöbes, Stefanie | - |
dc.contributor.author | Heidelmann, Markus | - |
dc.contributor.author | Grabowski, Blazej | - |
dc.contributor.author | Raabe, Dierk | - |
dc.date.accessioned | 2021-08-03T15:35:39Z | - |
dc.date.available | 2021-08-03T15:35:39Z | - |
dc.date.issued | 2016-06 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.issn | 1873-2453 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/52489 | - |
dc.description.abstract | We present a systematic atomic scale analysis of the structural evolution of long-period-stacking-ordered (LPSO) structures in the (i) α-Mg matrix and in the (ii) interdendritic LPSO phase of an Mg97Y2Zn1 (at. %) alloy annealed at 500°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 α-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 α-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 α-Mg matrix and the interdendritic LPSO phase are a mixture of 14H and α-Mg. © 2016 Acta Materialia Inc. | - |
dc.format.extent | 13 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Elsevier BV | - |
dc.title | The role of metastable LPSO building block clusters in phase transformations of an Mg-Y-Zn alloy | - |
dc.type | Article | - |
dc.publisher.location | 영국 | - |
dc.identifier.doi | 10.1016/j.actamat.2016.04.016 | - |
dc.identifier.scopusid | 2-s2.0-84963744391 | - |
dc.identifier.wosid | 000377326400017 | - |
dc.identifier.bibliographicCitation | Acta Materialia, v.112, pp 171 - 183 | - |
dc.citation.title | Acta Materialia | - |
dc.citation.volume | 112 | - |
dc.citation.startPage | 171 | - |
dc.citation.endPage | 183 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | Buildings | - |
dc.subject.keywordPlus | Density functional theory | - |
dc.subject.keywordPlus | Electron microscopy | - |
dc.subject.keywordPlus | High resolution transmission electron microscopy | - |
dc.subject.keywordPlus | Intermetallics | - |
dc.subject.keywordPlus | Linear transformations | - |
dc.subject.keywordPlus | Magnesium alloys | - |
dc.subject.keywordPlus | Scanning electron microscopy | - |
dc.subject.keywordPlus | Transmission electron microscopy | - |
dc.subject.keywordPlus | Zinc | - |
dc.subject.keywordPlus | Atomic-scale analysis | - |
dc.subject.keywordPlus | High-angle annular dark fields | - |
dc.subject.keywordPlus | Long-period stacking ordered structure | - |
dc.subject.keywordPlus | Longperiod stacking ordered structure (LPSO) | - |
dc.subject.keywordPlus | Low energy penalties | - |
dc.subject.keywordPlus | Separation distances | - |
dc.subject.keywordPlus | Shockley partial dislocations | - |
dc.subject.keywordPlus | Transformation sequences | - |
dc.subject.keywordPlus | Phase transitions | - |
dc.subject.keywordAuthor | Density functional theory (DFT) | - |
dc.subject.keywordAuthor | Long period stacking ordered structure | - |
dc.subject.keywordAuthor | Magnesium alloy | - |
dc.subject.keywordAuthor | Phase transformation | - |
dc.subject.keywordAuthor | Transmission electron microscopy (TEM) | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S1359645416302725?via%3Dihub | - |
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