DC Field | Value | Language |
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dc.contributor.author | Cizek, J. | - |
dc.contributor.author | Hruska, P. | - |
dc.contributor.author | Vlasak, T. | - |
dc.contributor.author | Vlcek, M. | - |
dc.contributor.author | Janecek, M. | - |
dc.contributor.author | Minarik, P. | - |
dc.contributor.author | Krajnak, T. | - |
dc.contributor.author | Slapakova, M. | - |
dc.contributor.author | Dopita, M. | - |
dc.contributor.author | Kuzel, R. | - |
dc.contributor.author | Kmjec, T. | - |
dc.contributor.author | Kim, J. G. | - |
dc.contributor.author | Kim, H. -S. | - |
dc.date.accessioned | 2018-06-15T05:23:43Z | - |
dc.date.available | 2018-06-15T05:23:43Z | - |
dc.date.created | 2017-12-04 | - |
dc.date.issued | 2017-09 | - |
dc.identifier.issn | 0921-5093 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/50429 | - |
dc.description.abstract | A hardenable lightweight Mg-22 wt%Gd alloy with ultra fine grained (UFG) structure was prepared by high pressure torsion (HPT) at ambient temperature. The development of microstructure during HPT processing was investigated. A homogeneous UFG structure with grain size of 300 nm was achieved after 15 HPT revolutions. The UFG alloy exhibits enhanced strength due to work strengthening by tangled dislocations forming a dense forest throughout grains. Dislocation density in the sample was determined by positron annihilation spectroscopy (PAS) and X-ray line profile analysis (XLPA). It was found that there is an additional source of X-ray profile broadening in addition to small crystallites and micro-strains caused by dislocations. The additional micro-strain component was attributed to lattice modulation by Gd-rich nano-wires formed by agglomeration of Gd solutes and to strains arising from boundaries of crystallite domains and inter-domain interactions. Analysis of the influence of the crystallite size on the strength of UFG Mg-22 wt%Gd alloy revealed a breakdown in the HallPetch relationship when the crystallite size decreased below a critical value of approximate to 30 nm. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.relation.isPartOf | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | - |
dc.subject | Y-ZR ALLOY | - |
dc.subject | SEVERE PLASTIC-DEFORMATION | - |
dc.subject | LINE-PROFILE ANALYSIS | - |
dc.subject | HALL-PETCH BREAKDOWN | - |
dc.subject | AZ61 MAGNESIUM ALLOY | - |
dc.subject | MECHANICAL-PROPERTIES | - |
dc.subject | THERMAL-STABILITY | - |
dc.subject | POSITRON-LIFETIME | - |
dc.subject | NANOCRYSTALLINE MATERIALS | - |
dc.subject | UNEXPECTED FORMATION | - |
dc.title | Microstructure development of ultra fine grained Mg-22 wt%Gd alloy prepared by high pressure torsion | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.msea.2017.07.100 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.704, pp.181 - 191 | - |
dc.identifier.wosid | 000411847100023 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 191 | - |
dc.citation.startPage | 181 | - |
dc.citation.title | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | - |
dc.citation.volume | 704 | - |
dc.contributor.affiliatedAuthor | Kim, H. -S. | - |
dc.identifier.scopusid | 2-s2.0-85028748893 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 3 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | Y-ZR ALLOY | - |
dc.subject.keywordPlus | SEVERE PLASTIC-DEFORMATION | - |
dc.subject.keywordPlus | LINE-PROFILE ANALYSIS | - |
dc.subject.keywordPlus | HALL-PETCH BREAKDOWN | - |
dc.subject.keywordPlus | AZ61 MAGNESIUM ALLOY | - |
dc.subject.keywordPlus | MECHANICAL-PROPERTIES | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | POSITRON-LIFETIME | - |
dc.subject.keywordPlus | NANOCRYSTALLINE MATERIALS | - |
dc.subject.keywordPlus | UNEXPECTED FORMATION | - |
dc.subject.keywordAuthor | Mg alloy | - |
dc.subject.keywordAuthor | Ultra fine grained material | - |
dc.subject.keywordAuthor | High pressure torsion | - |
dc.subject.keywordAuthor | Positron annihilation | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
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