| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Solid Phase Processing Symposium
|
| Presentation Title |
Microstructural Analysis and Modeling of Grain Refinement During Tribometric Surface Deformation |
| Author(s) |
Aashish Rohatgi, Yulan Li, Bharat Gwalani, Shenyang Hu, Yang He, Arun Devaraj, Erin I Barker, Tiffany Kaspar, Jinhui Tao, Chongmin Wang, Petr V Sushko, Suveen N Mathaudhu |
| On-Site Speaker (Planned) |
Aashish Rohatgi |
| Abstract Scope |
The goal of this work is to understand and model the microstructural evolution in the sub-surface region of metals and alloys under surface shear deformation. Pure Al and cast Al-Si alloy were selected as model materials and subjected to repeated surface shear using a pin-on-disk type linear reciprocating tribometer. The resulting sub-surface microstructure was analyzed using optical and electron microscopy and analytical techniques and was observed to undergo significant grain-size refinement. A model combining FFT-based crystal plasticity (CP) and phase field method (PFM) was developed to simulate the microstructural evolution - The CP simulations determine the dislocation density distribution and stored energy resulting from plastic deformation while the PFM is used to model grain refinement and evolution under plastic strains. The results of this work will provide insights into mechanisms associated with unique microstructures and properties that are often observed in materials subjected to solid phase processing. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |