Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kawasaki, Megumi | - |
dc.date.accessioned | 2016-10-21T06:56:25Z | - |
dc.date.available | 2016-10-21T06:56:25Z | - |
dc.date.issued | 2015-04 | - |
dc.identifier.citation | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v. 630, Page. 90-98 | en_US |
dc.identifier.issn | 0921-5093 | - |
dc.identifier.issn | 1873-4936 | - |
dc.identifier.uri | http://www.sciencedirect.com/science/article/pii/S0921509315001288 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/23904 | - |
dc.description.abstract | A 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.description.sponsorship | The authors acknowledge financial support from the R&D Convergence Program of MSIP and ISTK in Korea under Grant no. B551179-11-02-00 (KHJ and GAL) and the internship program with mutual agreement between YISS and the Advanced Materials Processing & Analysis Lab at Hanyang University (SKL). This research was supported in part by the NRF Korea funded by MoE under Grant no. NRF-2014057697 (MK), in part by the NRF Korea funded by MSIP under Grant no. NRF-2012R1A1A1012983 (BA) and in part by the European Research Council under ERC Grant Agreement no. 267464-SPDMETALS (TGL). | en_US |
dc.language.iso | en | en_US |
dc.publisher | ELSEVIER SCIENCE SA | en_US |
dc.subject | Hardness | en_US |
dc.subject | High-pressure torsion | en_US |
dc.subject | Magnesium alloy | en_US |
dc.subject | Severe plastic deformation | en_US |
dc.subject | Texture | en_US |
dc.title | Evolution in hardness and texture of a ZK60A magnesium alloy processed by high-pressure torsion | en_US |
dc.type | Article | en_US |
dc.relation.volume | 630 | - |
dc.identifier.doi | 10.1016/j.msea.2015.02.011 | - |
dc.relation.page | 90-98 | - |
dc.relation.journal | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | - |
dc.contributor.googleauthor | Lee, Han-Joo | - |
dc.contributor.googleauthor | Lee, Sang Kyung | - |
dc.contributor.googleauthor | Jung, Ki Ho | - |
dc.contributor.googleauthor | Lee, Geun An | - |
dc.contributor.googleauthor | Ahn, Byungmin | - |
dc.contributor.googleauthor | Kawasaki, Megumi | - |
dc.contributor.googleauthor | Langdon, Terence G. | - |
dc.relation.code | 2015002489 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF ENGINEERING[S] | - |
dc.sector.department | DIVISION OF MATERIALS SCIENCE AND ENGINEERING | - |
dc.identifier.pid | megumi | - |
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