About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
Deformation Behavior of Thermomechanically Processed and Ion Irradiated Tungsten using Nano-Indentation |
| Author(s) |
Carson Hester, Blake Emad, Siva Shankar Alla, Mohin Sharma, Saumyadeep Jana, Xiao-Ying Yu, Yutai Kato, Bibhudutta Rout, Vijay K Vasudevan, Sundeep Mukherjee |
| On-Site Speaker (Planned) |
Carson Hester |
| Abstract Scope |
Major drawbacks of tungsten and its alloys as plasma-facing materials is low ductility and high ductile-to-brittle transition temperature, attributed to a non-planar screw dislocation core structure that leads to high resistance to slip and weak grain boundary cohesion. These limitations are often addressed through thermomechanical processing and alloying additions. In this study, we present a systematic investigation of the deformation behavior of tungsten subjected to various thermomechanical and alloying treatments, with deformation characteristics quantified using nanoindentation. We evaluate the effects of rolling temperature, specific alloying additions, and the combined influence of alloying and thermomechanical processing to assess changes in mechanical behavior before and after elevated-temperature ion irradiation. We will focus on Nix-Gao modeling to describe hardness trends, the influence of heavy-ion (Ni) irradiation at elevated temperature (500°C) to 50 dpa, observe defect/dislocation structures and damage distribution using TEM imaging, and offer an analysis of the “pop-in” phenomenon observed during nanoindentation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, High-Temperature Materials |