About this Abstract |
| Meeting |
NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
|
| Symposium
|
NUMISHEET 2022
|
| Presentation Title |
Why the Hardening Rate Can Attend a Maximum Value of One Third of the Elastic Modulus in Strongly Textured Mg Alloys under Twinning Dominated Conditions? |
| Author(s) |
Chao Ma, Xiaoqian Guo, Huamiao Wang, Dayong Li, Yinghong Peng, Peidong Wu |
| On-Site Speaker (Planned) |
Peidong Wu |
| Abstract Scope |
Depending on the initial texture, the hardening rate in the macroscopic stress strain curve can attend a maximum value of one third of the elastic modulus. We numerically study the rapid hardening and possible role of exhaustion of twinning in magnesium alloys under twinning dominated conditions. It is found that upon the exhaustion of the tensile twinning, further deformation of the material requires activation of Prismatic and Pyramidal slip modes, which have relative high critical resolved shear stress. However, the stress level at the exhaustion of the tensile twinning is not high enough to activate Prismatic and Pyramidal slips. It is numerically demonstrated that, in the strain (or time) interval from the exhaustion of twinning to the activation of Prismatic and Pyramidal slip modes, the imposed strain increments are mainly accommodated by elastic deformations. Since the rapid hardening occurs during the same interval, it is concluded that the rapid hardening is associated with elasticity. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |