Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Megumi Kawasaki | - |
dc.date.accessioned | 2018-03-09T05:39:51Z | - |
dc.date.available | 2018-03-09T05:39:51Z | - |
dc.date.issued | 2013-07 | - |
dc.identifier.citation | JOURNAL OF MATERIALS SCIENCE 권: 48 호: 13 페이지: 4730-4741 | en_US |
dc.identifier.issn | 0022-2461 | - |
dc.identifier.uri | http://dx.doi.org/10.1007/s10853-012-7104-9 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/44204 | - |
dc.description | European Research Council under ERC | en_US |
dc.description.abstract | A Zn-22 % Al eutectoid alloy was processed by equal-channel angular pressing (ECAP) to reduce the grain size to similar to 0.8 mu m. Tensile testing at 473 K showed superplastic characteristics with a maximum elongation of similar to 2230 % at a strain rate of 1.0 x 10(-2) s(-1). The significance of grain boundary sliding (GBS) was evaluated by measuring sliding offsets at adjacent grains from the displacements of surface marker lines in samples pulled to elongations of 30 % at a series of different strain rates. The highest sliding contribution was recorded under testing conditions corresponding to the maximum superplastic ductility. There were relatively large offsets at the Zn-Zn and Zn-Al interfaces, but smaller offsets at the Al-Al interfaces. Analysis shows the results are affected by the presence of agglomerates of similar grains which are present after ECAP processing and specifically by the increased fraction of Al-Al boundaries. The experimental results are in excellent agreement with the predictions of a deformation mechanism map depicting the flow behavior in the Zn-22 % Al alloy, and the results confirm the importance of GBS as the dominant mechanism of flow in superplasticity after processing by ECAP. | en_US |
dc.description.sponsorship | National Science Foundation of the United States | en_US |
dc.language.iso | en | en_US |
dc.publisher | SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA | en_US |
dc.subject | DEFORMATION-MECHANISM MAPS | en_US |
dc.subject | SEVERE PLASTIC-DEFORMATION | en_US |
dc.subject | HIGH-TEMPERATURE CREEP | en_US |
dc.subject | HIGH-PRESSURE TORSION | en_US |
dc.subject | ZN-22-PERCENT AL | en_US |
dc.subject | ALUMINUM-ALLOY | en_US |
dc.subject | MICROSTRUCTURAL EVOLUTION | en_US |
dc.subject | ACTIVATION-ENERGIES | en_US |
dc.subject | INTER-CRYSTALLINE | en_US |
dc.subject | NECK FORMATION | en_US |
dc.title | The significance of grain boundary sliding in the superplastic Zn-22 % Al alloy processed by ECAP | en_US |
dc.type | Article | en_US |
dc.relation.volume | 48 | - |
dc.identifier.doi | 10.1007/s10853-012-7104-9 | - |
dc.relation.page | 4730-4741 | - |
dc.relation.journal | JOURNAL OF MATERIALS SCIENCE | - |
dc.contributor.googleauthor | Kawasaki, Megumi | - |
dc.contributor.googleauthor | Langdon, Terence G. | - |
dc.relation.code | 2013010787 | - |
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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