About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Magnetic Materials for Energy and Power Conversion Applications
|
Presentation Title |
Computational Modeling of Fracture in Sm-Co Magnet |
Author(s) |
Ikenna Nlebedim, Xubo Liu, Baozhi Cui, Jun Cui |
On-Site Speaker (Planned) |
Ikenna Nlebedim |
Abstract Scope |
Samarium-cobalt (Sm-Co) magnets are the strongest magnets for high temperature (>300˚C) applications but their intrinsic brittle feature makes them susceptible to chipping and fracturing during magnet fabrication and device assembly. We will present full field micromechanics modeling targeted at improving the fracture toughness by correlating microstructure and fracture behavior. Crack initialization and growth were treated using a phase field method. Our simulated microstructure models include Sm-Co with single grain size distribution, oxide particle doped Sm-Co magnet, and laminated Sm-Co with alternating fine and coarse size layers. It was found that intragranular fracture behavior remains dominant, irrespective of the microstructure type. We will discuss the effects of grain refinement, especially due to additives, on fracture behavior. We will also show the roles of interfaces in complex laminated microstructures, including how each microstructural feature influences fracture toughness. Finally, our presentation will reveal possible routes to enhancing fracture toughness while considering magnetic performance. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Mechanical Properties, Modeling and Simulation |