| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
F-40: Effect of Gradient Nanostructure on Microstructure and Mechanical Properties of AZ31 Magnesium Alloy under High Strain Fate |
| Author(s) |
Yong Liu, Meng Duan |
| On-Site Speaker (Planned) |
Yong Liu |
| Abstract Scope |
In order to investigate the microstructure evolution and mechanical behavior of AZ31 alloy with gradient nanostructure under high strain rate, the split Hopkinson pressure bar (SHPB) apparatus was used to testing the true stress-true strain curves under the high strain rates of 500 and 1200 s-1 of AZ31 Mg alloy with gradient nanostructure prepared by surface mechanical attrition treatment. The results showed that the AZ31 alloy with gradient nanostructure exhibits better energy absoption ability than the one with traditional homogeneous microstructure. Under high-speed deformation conditions, cracks sprout in the shear band and expand along the shear band. Gradient nanostructures can effectively inhibit the formation of shear bands and hinder the initiation and propagation of cracks. The formation of gradient nanostructures consumes small-angle grain boundaries in the microstructure and transforms them into large-angle grain boundaries. The reduction of the small angle grain boundaries makes the formation of shear bands more difficult. |
| Proceedings Inclusion? |
Planned: |