High Temperature Deformation Behavior of 8090 Al-Li Alloy
High temperature deformation behavior, especially the superplasticity of an 8090 Al-Li alloy, was studied within the recent framework of the internal variable theory of structural superplasticity. In this study, a series of load relaxation tests were conducted at various temperatures ranging from 20...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/512606 |
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| _version_ | 1832551427716677632 |
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| author | Woo Young Jung Tae Kwon Ha |
| author_facet | Woo Young Jung Tae Kwon Ha |
| author_sort | Woo Young Jung |
| collection | DOAJ |
| description | High temperature deformation behavior, especially the superplasticity of an 8090 Al-Li alloy, was studied within the recent framework of the internal variable theory of structural superplasticity. In this study, a series of load relaxation tests were conducted at various temperatures ranging from 200°C to 530°C to obtain the flow curves of log ε˙ versus log ε. The effect of grain size was also examined by varying the grain sizes through a proper thermomechanical treatment. The flow curves were found to be composite curves consisting of contributions from grain boundary sliding (GBS) and grain matrix deformation (GMD) at superplastic temperatures. The activation energy obtained for GMD was 124.9 kJ/mole in the temperature range from 470°C to 530°C, very similar to that for self-diffusion in pure Al. |
| format | Article |
| id | doaj-art-cdf03973550b4c548ad47c5fdaaa2dfe |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-cdf03973550b4c548ad47c5fdaaa2dfe2025-02-03T06:01:30ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422013-01-01201310.1155/2013/512606512606High Temperature Deformation Behavior of 8090 Al-Li AlloyWoo Young Jung0Tae Kwon Ha1Department of Civil Engineering, Gangneung-Wonju National University, 120 Gangneung-Daehangno, Gangneung, Gangwon 210-702, Republic of KoreaDepartment of Advanced Metal and Materials Engineering, Gangneung-Wonju National University, 120 Gangneung-Daehangnu, Gangneung, Gangwon 210-702, Republic of KoreaHigh temperature deformation behavior, especially the superplasticity of an 8090 Al-Li alloy, was studied within the recent framework of the internal variable theory of structural superplasticity. In this study, a series of load relaxation tests were conducted at various temperatures ranging from 200°C to 530°C to obtain the flow curves of log ε˙ versus log ε. The effect of grain size was also examined by varying the grain sizes through a proper thermomechanical treatment. The flow curves were found to be composite curves consisting of contributions from grain boundary sliding (GBS) and grain matrix deformation (GMD) at superplastic temperatures. The activation energy obtained for GMD was 124.9 kJ/mole in the temperature range from 470°C to 530°C, very similar to that for self-diffusion in pure Al.http://dx.doi.org/10.1155/2013/512606 |
| spellingShingle | Woo Young Jung Tae Kwon Ha High Temperature Deformation Behavior of 8090 Al-Li Alloy Advances in Materials Science and Engineering |
| title | High Temperature Deformation Behavior of 8090 Al-Li Alloy |
| title_full | High Temperature Deformation Behavior of 8090 Al-Li Alloy |
| title_fullStr | High Temperature Deformation Behavior of 8090 Al-Li Alloy |
| title_full_unstemmed | High Temperature Deformation Behavior of 8090 Al-Li Alloy |
| title_short | High Temperature Deformation Behavior of 8090 Al-Li Alloy |
| title_sort | high temperature deformation behavior of 8090 al li alloy |
| url | http://dx.doi.org/10.1155/2013/512606 |
| work_keys_str_mv | AT wooyoungjung hightemperaturedeformationbehaviorof8090allialloy AT taekwonha hightemperaturedeformationbehaviorof8090allialloy |