About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Evolving Anisotropy-Based Plasticity Model for Lightweight Alloys at Medium Temperature |
| Author(s) |
Seonghwan Choi, Kyungmun Min, Hyukjong Bong |
| On-Site Speaker (Planned) |
Seonghwan Choi |
| Abstract Scope |
The structural application of lightweight magnesium alloys at medium temperatures is increasing due to their limited formability at room temperature. This study presents an advanced plasticity model for magnesium alloys at medium temperatures, incorporating both evolving anisotropy and tension-compression asymmetry. The model is calibrated using uniaxial flow stresses and R-values measured along various directions at 200 °C. Nakajima tests are conducted to obtain forming limit curves, and round cup drawing experiments are performed to measure thickness profiles in various directions. Forming limits are predicted using the Marciniak–Kuczyński (MK) method, successfully capturing the onset of localized necking under evolving anisotropy. The simulated thickness profiles from cup drawing closely match experimental results, confirming the importance of modeling evolving anisotropy for accurate formability predictions. The proposed framework provides a robust approach to plasticity modeling of magnesium sheets, supporting their application in lightweight automotive and aerospace components. |