About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
A Micromechanics-based Modeling of Twin Evolution in Hexagonal Closed Packed Metals |
Author(s) |
Yubraj Paudel, Christopher Barrett, Haitham El Kadiri |
On-Site Speaker (Planned) |
Yubraj Paudel |
Abstract Scope |
Twin nucleation is an important phenomenon leading to anisotropy and damage in magnesium AZ31 alloy. The strain path anisotropy in magnesium AZ31 alloy results from profuse nucleation of {10-12} twinning under c-axis tension (tension twinning) or d-axis compression (extension twinning) while damage induces from various interactions between twins and other grain defects. This work demonstrates that micromechanical work field calculations can have great potential to guide laws for crystal plasticity to predict twin patterning. The study shows a minimum energy path of twinning evolution through twin nucleation, propagation, and growth. The investigated twinning behaviors include twin propagation to the neutral axis, nucleation of a second twin at a certain distance from the first one, and twin growth with the microstructure finally evolving to a favorable twinning pattern to accommodate the total bending strain. The twinning mechanisms observed from this analysis compare well with the experimental results. |
Proceedings Inclusion? |
Planned: At-meeting proceedings |