About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
| Presentation Title |
Effect of Proton Irradiation on LPBF Fabricated W and W-5Re Alloy |
| Author(s) |
Krishna Kamlesh Verma, Mohin Sharma, KV Mani Krishna, Shashank Sharma, Madhavan Radhakrishnan, Bibhudutta Rout, Narendra Dahotre |
| On-Site Speaker (Planned) |
Krishna Kamlesh Verma |
| Abstract Scope |
The effect of proton (H⁺) irradiation on the microstructure and mechanical properties of Laser Powder Bed Fusion (LPBF)-fabricated pure tungsten (W) and tungsten-5 wt.% rhenium (W-5Re) alloy was comprehensively investigated. Near-dense samples were irradiated with 1.0 MeV H⁺ ions to a fluence of 1.0×10^19 ions/cm^2 at room temperature. TEM and APT analyses revealed that pure W exhibited higher void density, severe surface blistering, and dense dislocation loops, while W-5Re showed improved resistance to void formation and enhanced loop interactions. Both samples experienced grain refinement, increased low-angle grain boundary fractions, and texture weakening. APT confirmed larger and more voluminous Re-rich clusters following irradiation. Nanoindentation indicated significant irradiation hardening ~58% in W and ~38% in W-5Re. Re addition improved microstructural stability and radiation tolerance, highlighting the suitability of W-5Re alloy for fusion reactor applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |