  One of the challenges in fusion reactors is the discovery of plasma facing
materials capable of withstanding extreme conditions, such as radiation damage
and high heat flux. Development of fusion materials can be a daunting task
since vast combinations of microstructures and compositions need to be
explored, each of which requires trial-and-error based irradiation experiments
and materials characterizations. Here, we utilize combinatorial experiments
that allow rapid and systematic characterizations of composition-microstructure
dependent irradiation damage behaviors of nanostructured tungsten alloys. The
combinatorial materials library of W-Re-Ta alloys was synthesized, followed by
the high-throughput experiments for probing irradiation damages to the
mechanical, thermal, and structural properties of the alloys. This highly
efficient technique allows rapid identification of composition ranges with
excellent damage tolerance. We find that the distribution of implanted He
clusters can be significantly altered by the addition of Ta and Re, which play
a critical role in determining property changes upon irradiation.
