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dc.contributor.authorMegumi Kawasaki-
dc.date.accessioned2018-03-30T08:38:01Z-
dc.date.available2018-03-30T08:38:01Z-
dc.date.issued2014-06-
dc.identifier.citationIOP Conf. Series: Materials Science and Engineering,63,10pagesen_US
dc.identifier.urihttp://iopscience.iop.org/article/10.1088/1757-899X/63/1/012101/meta-
dc.identifier.urihttp://hdl.handle.net/20.500.11754/54488-
dc.description.abstractSevere plastic deformation (SPD) is an attractive processing method for refining microstructures of metallic materials to give ultrafine grain sizes within the submicrometer to even the nanometer levels. Experiments were conducted to discuss the evolution of hardness, microstructure and strain rate sensitivity, m, in a Zn-22% Al eutectoid alloy processed by high- pressure torsion (HPT). The data from microhardness and nanoindentation hardness measurements revealed that there is a significant weakening in the Zn-Al alloy during HPT despite extensive grain refinement. Excellent room-temperature (RT) plasticity was observed in the alloy after HPT from nanoindentation creep in terms of an increased value of m. The microstructural changes with increasing numbers of HPT turns show a strong correlation with the change in the m value. Moerover, the excellent RT plasticity in the alloy is discussed in terms of the enhanced level of grain boundary sliding and the evolution of microsturucture.en_US
dc.description.sponsorshipThis research was supported by the National Research Foundation of Korea (NRF) grant funded by theKorea government (MSIP) (No. 2013R1A1A2A100 58551). The work at USC and the University of Southampton was supported in part by the National Science Foundation of the United States under Grant No. DMR-1160966 and in part by the European Research Council under ERC Grant Agreement No. 267464-SPDMETALS.en_US
dc.language.isoenen_US
dc.publisherIOPen_US
dc.titleEvolution of hardness, microstructure, and strain rate sensitivity in a Zn-22% Al eutectoid alloy processed by high-pressure torsionen_US
dc.typeArticleen_US
dc.relation.no012101-
dc.relation.volume63-
dc.identifier.doi10.1088/1757-899X/63/1/012101-
dc.relation.page1-10-
dc.relation.journalIOP Conference Series: Materials Science and Engineering-
dc.contributor.googleauthorMegumi Kawasaki-
dc.contributor.googleauthorLee, Han-Joo-
dc.contributor.googleauthorChoi, In-Chul-
dc.contributor.googleauthorJang, Jae-il-
dc.contributor.googleauthorAhn, Byung-min-
dc.contributor.googleauthorTerence G Langdon-
dc.relation.code2014012149-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE AND ENGINEERING-
dc.identifier.pidmegumi-
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COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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