| Title |
Mechanical Behaviors : Microstructure and Mechanical Properties of 5083 Aluminum Alloy Processed by Equal Channel Angular Pressing at Elevated Temperature |
| Authors |
강효경(Hyo Gyoung Kang); (L . Bachelard); 김향욱(Hyoung Wook Kim); 강석봉(Suk Bong Kang) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
The microstructure and mechanical properties have been investigated on a commercial 5083 aluminum alloy processed by the equal-channel angular pressing (ECAP) at 473K. The microstructure of a single pass sample consisted of elongated subgrains. Increasing the number of pass led to very fine equilibrium grains having high angle grain boundaries. The 0.2% yield stress and hardness after a single pass increased greatly, and then kept constant with additional straining. On the other hand, the elongation to failure of a single pass sample decreased a little to compare with sample before ECAP, but there was no further reduction with additional straining. Recrystallization partially occurred in ECAPed 5083 aluminum alloy when annealed at 523K for 1 hr, and completely finished when annealed only at 573K for 1 hr. With increasing the number of pass, the onset temperature of recrystallization decreased and the rate of softening increased. |