About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
|
| Presentation Title |
Mechanical Properties of Nanoporous Tungsten under Irradiation - Modeling and Experiments |
| Author(s) |
Carlos J. Ruestes, Raquel Gonzalez-Arrabal, Miguel Monclus, Manuel Avella, Lukas Schweiger, Daniel Kiener, Ulrich Kentsch, Jon Molina-Aldareguia, Javier Segurado |
| On-Site Speaker (Planned) |
Carlos J. Ruestes |
| Abstract Scope |
Nanoporous refractory metals are a class of functional materials with remarkable potential for nuclear applications. They combine the excellent mechanical and radiation performance of the base material with porosity-enhanced tolerance to irradiation. In this contribution, nanoporous W with ~35% porosity and average ligament size of 20-25 nm was manufactured using severe plastic deformation of a coarse-grained W-Cu composite followed by selective dissolution of Cu. The resulting np-W was implanted at high fluence with H and He at energies of 82 keV and 160 keV,respectively. Nanoindentation and micropillar compression experiments revealed a hardness and yield stress increase due to irradiation. Molecular dynamics simulations of radiation damage and FFT-based crystal plasticity simulations were combined to quantify the effect of H and He implantation on np-W mechanical properties. The experimental results are interpreted based on a model accounting for the increased resistance to dislocation glide by helium-implantation-induced defects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Modeling and Simulation |