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dc.contributor.authorMegumi Kawasaki-
dc.date.accessioned2016-11-29T00:08:43Z-
dc.date.available2016-11-29T00:08:43Z-
dc.date.issued2015-05-
dc.identifier.citationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 635, Page. 109-117en_US
dc.identifier.issn0921-5093-
dc.identifier.issn1873-4936-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0925400514005280?via%3Dihub-
dc.description.abstractThe strengthening of metals is essentially controlled by the microstructures of the metal solids and it is well understood that smaller grain sizes lead to higher hardness and increased strength. Nevertheless, true bulk nanostructured materials are difficult to produce using established engineering techniques, especially when considering the practical and societal needs of materials selection. Lightweight Al and Mg are conventional metals having excellent physico-chemical and mechanical properties and with good strength/weight ratios in the finished products. However, the fabrication of high-strength metals consisting of these elements, using mechanical alloying and milling and cladding-type metal working, generally involves long-term processing conducted under extreme conditions using special facilities. The present study demonstrates the very rapid synthesis of a metal matrix nanocomposite (MMNC) of the Al-Mg system which was achieved by stacking metal disks of the two pure metals and processing by high-pressure torsion at ambient temperature for 10 turns. An exceptionally high hardness was achieved, similar to many steels, through rapid stress-induced diffusion of Mg and the simultaneous formation of intermetallic nano-layers and a nanostructured intermetallic compound with a supersaturated solid solution. This unexpected result suggests a potential for simply and expeditiously fabricating a wide range of MMNCs. (C) 2015 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis work was supported in part by the NRF Korea funded by MSIP under Grant no. NRF-2012R1A1A1012983 (BA), in part by the Russian Science Foundation under Grant no. 14-29-00199 (APZ), in part by the NRF Korea funded by MoE under Grant no. NRF-2014057697 (MK), in part by the NSF of the United States under Grant no. DMR-1160966 and in part by the European Research Council under ERC Grant agreement no. 267464-SPDMETALS (TGL).en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE SAen_US
dc.subjectAl-Mgen_US
dc.subjectHardnessen_US
dc.subjectHigh-pressure torsionen_US
dc.subjectIntermetallic compounden_US
dc.subjectSevere plastic deformationen_US
dc.titleRapid synthesis of an extra hard metal matrix nanocomposite at ambient temperatureen_US
dc.typeArticleen_US
dc.relation.volume635-
dc.identifier.doi10.1016/j.msea.2015.03.042-
dc.relation.page109-117-
dc.relation.journalMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING-
dc.contributor.googleauthorAhn, Byungmin-
dc.contributor.googleauthorZhilyaev, Alexander P.-
dc.contributor.googleauthorLee, Han-Joo-
dc.contributor.googleauthorKawasaki, Megumi-
dc.contributor.googleauthorLangdon, Terence G.-
dc.relation.code2015002489-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE AND ENGINEERING-
dc.identifier.pidmegumi-
dc.identifier.researcherIDA-1872-2010-
dc.identifier.orcidhttp://orcid.org/0000-0003-0028-3007-
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COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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