Behavior of high-entropy W-rich alloys Wx(TaVCrTi)y under He+ irradiation

A Review of Irradiation-Tolerant Refractory High-Entropy Alloys

“…The yellow arrow in Figure 6d-e shows that V accumulates around He bubbles and Ti, Nb, and Ta are depleted around the He bubbles. Cui et al [30] studied the irradiation behaviors of pure W and W-rich RHEAs (RHEA-W). The RHEA-W alloys consist of ultrafine grains with a body-centered cubic (BCC) structure.…”

“…This indicates that the alloys can inhibit the diffusion of helium and effectively inhibit the growth of helium bubbles after the introduction of V (Figure 7a,b). The accumulation and clustering of helium bubbles may be mitigated by Cui et al [30] studied the irradiation behaviors of pure W and W-rich RHEAs (RHEA-W). The RHEA-W alloys consist of ultrafine grains with a body-centered cubic (BCC) structure.…”

“…To sum up, it was found in previous studies that many elements in the 3D transition group possess high neutron absorption and activation, which are not ideal for nuclear applications. In addition, HEAs with a body-centered cubic (BCC) structure have begun to be explored owing to their higher resistance to helium embrittlement and swelling [5,12,30,31]. Therefore, new HEA systems with a BCC structure have recently attracted attention.…”

“…As one type of HEA, refractory high-entropy alloys (RHEAs) are mainly composed of multiple principal refractory elements [7,8,30]. They possess a BCC structure, good phase stability, and high melting points and operating temperatures, and have good prospects in nuclear applications.…”