The Microstructural and Hardness Changes of Tungsten Fiber after Au2+ Irradiation

Tungsten fiber-reinforced tungsten composite (Wf/W) material is considered a plasma-facing (PFM) with good application prospects. Commercial wire (fiber) prepared through forging and drawing processes has excellent mechanical properties, as well very high recrystallization temperature due to the unique texture of it grain structure. fiber most proper reinforcement for Wf/W. The change in properties because neutron irradiation makes inevitable Wf/W be used PFMs. However, there little research on caused by irradiation. In this work, we heavy ion simulate displacement damage generated explore alteration commercial investigated subject was diameter 300 μm. source 7.5 MeV Au2+, which maximum 60 dpa at depth 400 nm, influenced 1000 nm. Because irradiation, significant lattice distortion occurred within fiber, resulting transition from (110) (100) fiber’s cross-section. results Schmidt factor Taylor analysis indicate decrease plasticity after but did not completely lose its plasticity. nanoindentation test confirmed radiation hardening. After hardness increased approximately 0.33 GPa, increase relatively small compared other tungsten-based materials. This indicates that low-cost highly reliable