| Title |
Mechanical Behaviors : Dynamic Recrystallization and Work Softening of the Al Alloy During Equal Channel Angular Pressing |
| Authors |
이재철(Jae Chul Lee),서진유(Jin Yoo Suh),안재평(Jae Pyung Ahn) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
Commercially pure Al alloy sheets were processed using high strain rate dissimilar channel angular pressing(DCAP) as many as 100 passages through the channel with φ= 120˚ in order to investigate the work hardening and the work softening behaviors caused by extremely high strain level (~58). The hardness of the alloy increased significantly by a factor of 2 at strains less than ~2.0, while a gradual decrease in the hardness was observed at strains greater than ~2.0. The work hardening and the work softening behaviors observed from the Al alloy were analyzed by correlating the measured properties with microstructural evolutions observed by transmission electron microscopy(TEM). A detailed microstructural evolution sequence occurring at successive strain stages was also demonstrated. |