| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-50: Phase Field Modelling of Microtube Formation in NiTi Shape Memory Alloys |
| Author(s) |
Vinay Oruganti, Sravya Josyula, Ravi Kumar, Ashley Paz y Puente, Eric Payton |
| On-Site Speaker (Planned) |
Vinay Oruganti |
| Abstract Scope |
Phase field is an important approach for simulating microstructure evolution at the mesoscale. Within the domain of polycrystalline metals, vacancy transport exerts a clear influence on microstructural changes. The vacancy dynamics and pore nucleation in the Ni-Ti alloy system are explained by the sharp interface phase field model. This research aims to simulate and understand the formation and evolution of Kirkendall pores near the center of Ti-coated Ni wires during interdiffusion, resulting in the creation of NiTi shape memory alloy microtubes. The sharp interface model was implemented in multiphysics software and different boundary conditions were explored to gain a greater understanding of the pore nucleation process that leads to microtube formation. The role of various simulation conditions in producing agreements and discrepancies with experimental observations will be discussed, along with prospects for connecting CALPHAD mobility databases to multiphysics software to investigate other alloy systems. |