| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
F-39: Effect of Annealing on Microstructure and Mechanical Properties of Mg-6Al Alloy Plates Processed by Differential Speed Rolling |
| Author(s) |
Honglin Zhang, Zhigang Xu, Sergey Yarmolenko, Laszlo Kecskes, Qiuming Wei, Jag Sankar |
| On-Site Speaker (Planned) |
Honglin Zhang |
| Abstract Scope |
Room-temperature formability of wrought Mg alloys can be improved via plastic deformation. However, the inhomogeneous microstructure and residual stress of the plastically deformed Mg alloys affect subsequent processing. In this study, 6-mm thick Mg-6wt.% Al plates were obtained via DSR, with a total 50% thickness reduction, using 0.76 mm reduction per pass with a speed ratio of 2. The effects of temperature and hold time on the microstructure, texture, and mechanical properties were investigated. Compared to the as-rolled plates, annealing at 300°C for 15 min refined the grain size and increased ductility from 20.3 to 26.8% and 14.9 to 20.5% in the RD and TD directions, respectively. The ultimate strength decreased from 307 to 290 MPa in both directions; the hardness was reduced from 73 to 60 HV. The results show that a combination of DSR and annealing improves formability via a weakening of the basal texture by static recrystallization. |
| Proceedings Inclusion? |
Planned: |