| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
A Study on Migrating Boundary Induced Plasticity Using Molecular Dynamics Simulation for Pure Iron |
| Author(s) |
Simoon Sung, Jaehoon Jang, Yanghoo Kim, Heung Nam Han |
| On-Site Speaker (Planned) |
Simoon Sung |
| Abstract Scope |
It has been observed that a permanent deformation occurs during solid-solid phase transformation of ferrous or other alloys, even when subjected to stress much lower than the yield stress. This phenomenon, which is known as transformation plasticity or transformation induced plasticity, is known to cause many engineering problems. Interestingly, a similar phenomenon was observed during recrystallization and grain growth. To explain the phenomenon, the concept of migrating boundary induced plasticity (MIP) had been suggested. In this presentation, we used a molecular dynamics (MD) simulation to confirm the presence of a significant amount of permanent deformation that occurs during grain growth under external stress. And it was found that this permanent deformation is a thermal activation process, which is consistent with the MIP. Based on these results, a newly modified phenomenological MIP model was proposed, and this modified MIP model was able to explain the permanent deformation obtained by MD results. |