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dc.contributor.authorMegumi Kawasaki-
dc.date.accessioned2016-06-08T08:17:40Z-
dc.date.available2016-06-08T08:17:40Z-
dc.date.issued2015-01-
dc.identifier.citationJournal of Materials Research and Technology, v. 4, NO 1, Page. 18-25en_US
dc.identifier.issn0921-5093-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/21599-
dc.identifier.urihttp://www.sciencedirect.com/science/article/pii/S0921509315001288-
dc.description.abstractA ZK60A magnesium alloy was processed by high-pressure torsion (HPT) at room temperature at compressive pressures up to a maximum of 6.0 GPa for up to 5 revolutions and this produced significant grain refinement and the development of a bi-modal microstructure. The evolution of hardness was evaluated using measurements of the Vickers microhardness and the change in texture was examined by X-ray diffraction (XRD) analysis. The hardness results demonstrated an evolution with increasing equivalent strain and a strain hardening behavior which may be quantified using a hardenability exponent of similar to 0.07 when processing under a pressure of 6.0 GPa. An XRD analysis over the total disk surface showed that the texture changed from a typical extrusion prior to HPT towards a saturated very weak basal fiber texture which developed in the early stages of HPT and remained constant with additional torsional straining up to 5 turns. By contrast, an XRD analysis of the local microstructure taken at the edges of the processed disks demonstrated significant changes towards a strong basal fiber texture via different texture stages with increasing HPT revolutions. This study demonstrates the importance of carefully documenting the measurement areas selected for texture analysis in the ZK60A alloy after HPT because of the occurrence of significant microstructural variations within the samples. (C) 2015 Elsevier B.V. All rights reserved.en_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectTextureen_US
dc.subjectHardnessen_US
dc.subjectHigh-pressure torsionen_US
dc.subjectMagnesium alloyen_US
dc.subjectSevere plastic deformationen_US
dc.titleEvolution in hardness and microstructure of ZK60A magnesium alloy processed by high-pressure torsionen_US
dc.typeArticleen_US
dc.relation.no1-
dc.relation.volume4-
dc.identifier.doi10.1016/j.msea.2015.02.011-
dc.relation.page18-25-
dc.relation.journalJournal of Materials Research and Technology-
dc.contributor.googleauthorLee, Han-Joo-
dc.contributor.googleauthorLee, Sang Kyung-
dc.contributor.googleauthorJung, Ki Ho-
dc.contributor.googleauthorLee, Geun An-
dc.contributor.googleauthorAhn, Byungmin-
dc.contributor.googleauthorKawasaki, Megumi-
dc.contributor.googleauthorLangdon, Terence G.-
dc.relation.code2015041841-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE & ENGINEERING-
dc.identifier.pidmegumi-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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