|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Effect of Orientations on Microstructure and Mechanical Properties of 7075 Aluminum Alloy by Rolling at Liquid Nitrogen Temperature
||Jun Luo, Hongyun Luo
|On-Site Speaker (Planned)
The microstructure and properties of 7075 aluminum alloy sheet with 7.5mm in thickness with different orientations (the rolling direction and normal direction) were investigated after rolling at liquid nitrogen temperature with low strain (50 % reduction) and strain rate (<1s-1). Stable stacking faults led by Frank partial dislocations and extrinsic stacking faults surrounded by dislocation areas and precipitates are found in the normal direction after artificial aging of 75 and 175 hours at 343K. Furthermore, an intrinsic stacking fault is also found between two GPⅡ zones whose distance is 2nm in the normal direction. However, stacking faults are not found in the rolling direction under the same aging condition. The hardness and ductility increase with increasing the ageing time in both directions, but the hardness and ductility in the normal direction are larger than that in the rolling direction after the same ageing time.
||Planned: None Selected