Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 신동혁 | - |
dc.date.accessioned | 2021-01-25T05:15:34Z | - |
dc.date.available | 2021-01-25T05:15:34Z | - |
dc.date.issued | 2002-09 | - |
dc.identifier.citation | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, v. 33A, issue. 9, page. 2859-2867 | en_US |
dc.identifier.issn | 1073-5623 | - |
dc.identifier.issn | 1543-1940 | - |
dc.identifier.uri | https://link.springer.com/article/10.1007/s11661-002-0271-6 | - |
dc.identifier.uri | https://www.proquest.com/docview/213714382?accountid=11283 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/157413 | - |
dc.description.abstract | A submicrometer-grained structure was introduced in a commercial 5083 Al alloy by imposing an effective strain of ∼8 through equal channel angular pressing. In order to examine the low-temperature superplastic behavior, the as-equal channel angular pressed (as-ECAP) samples were tensile tested in the strain rate range of 10−5 to 10−2 s−1 at temperatures of 498 to 548 K corresponding to 0.58 to 0.65 T m, where T m is the incipient melting point. The mechanical data of the alloy at 498 and 548 K exhibited a sigmoidal behavior in a double logarithmic plot of the maximum true stress vs true strain rate. The strain rate sensitivity was 0.1 to 0.2 in the low- and high-strain rate regions and 0.4 in the intermediate-strain rate region, indicating the potential for superplasticity. At 523 K, instead of the sigmoidal behavior, a strain rate sensitivity of 0.4 was maintained to low strain rates. A maximum elongation of 315 pct was obtained at 548 K and 5×10−4 s−1. The activation energy for deformation in the intermediate-strain rate region was estimated as 63 kJ/mol. Low-temperature superplasticity of the ultrafine grained 5083 Al alloy was attributed to grain boundary sliding that is rate-controlled by grain boundary diffusion, with a low activation energy associated with nonequilibrium grain boundaries. Cavity stringers parallel to the tensile axis were developed during deformation, and the failure occurred in a quasi-brittle manner with moderately diffusive necking. | en_US |
dc.description.sponsorship | This work was supported by the Korea Ministry of Science and Technology through the "2000 National Research Laboratory Program." | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Springer | en_US |
dc.title | Low-temperature superplastic behavior of a submicrometer-grained 5083 Al alloy fabricated by severe plastic deformation | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1007/s11661-002-0271-6 | - |
dc.relation.journal | METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND | - |
dc.contributor.googleauthor | Park, Kyung-Tae | - |
dc.contributor.googleauthor | Hwang, Duck-Young | - |
dc.contributor.googleauthor | Chang, Si-Young | - |
dc.contributor.googleauthor | Shin, Dong Hyuk | - |
dc.relation.code | 2012206650 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING | - |
dc.identifier.pid | dhshin | - |
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