| Title |
Effect of Deformation Route on the Microstructure and Mechanical Properties of AA 5083 Alloy Processed by Warm Multiple Deformation |
| Authors |
김재운(Jae Woon Kim); 민복기(Bok Ki Min); 김형욱(Hyoung Wook Kim); 강석봉(Suk Bong Kang); 박익민(Ik Min Park) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Warm multiple deformation; Dynamic recrystallization; Deformation route; Superplasticity; AA5083 |
| Abstract |
The microstructures and mechanical properties of AA5083 alloys processed by warm multiple deformation at different temperatures of 573 K, 623 K, and 673 K were investigated. The Annealed AA5083 plates were compressed at a strain rate of 0.l/sec by two deformation routes, that is, route A and route B. Route A is to rotate the specimen throughout 90˚ around the vertical axis of loading direction at every passes. Route B is to rotate the specimen throughout 90˚ around the parallel axis of loading direction and then rotate it again as route A. The specimen warm-multiple deformed by route B showed finer grain size and more uniform distribution of grain than those processed by route A. When the warm multiple deformation process was repeated up to 8 passes at 673 K, the specimen consisted of ultrafine grained structure with the average grain size less than 4 μm. The superplastic properties can be obtained at the strain rates of 0.01/sec to 0.001/sec at 673 K. The maximum elongation to failure and the corresponding strain rate sensitivity, m, were 450% and about 0.44, respectively. |