Bulk nanolayered Cu/V composites simultaneously exhibit high strength and outstanding thermal stability due to its unusually high density of interfaces. However, investigation of the irradiation stability of this material is still in its infancy, limiting further application of these materials under radiation conditions. Herein we investigated the radiation response of bulk nanolayered Cu/V composites exposed to 200 keV He ions with two irradiation fluences of 2 × 10²¹ ions/m² and 7 × 10²² ions/m². It is demonstrated that the bulk Cu/V nanolayered composites remained stable with respect to mechanical property and microstructure after irradiation with fluence of 2 × 10²¹ ions/m². In contrast, for materials exposed to high irradiation fluence of 7 × 10²² ions/m², severe irradiation damage, such as obvious surface blistering, elongated He voids, and layer morphological instability, were developed. In addition, asymmetric He bubbles distribution and obvious He bubble-free zones were observed near the Cu/V interfaces and within layers. The mechanisms of radiation-induced instabilities and He bubbles formation are discussed in detail.

块状纳米层Cu / V复合材料由于其界面密度异常高而同时具有高强度和出色的热稳定性。然而，对该材料的辐射稳定性的研究仍处于起步阶段，限制了这些材料在辐射条件下的进一步应用。在本文中，我们研究了暴露于200 keV He离子的块状纳米层Cu / V复合材料的辐射响应，两种辐射通量分别为2×10 ²¹离子/ m ²和7×10 ²²离子/ m ²。结果表明，以2×10 ²¹离子/ m ^2的注量辐照后，块状Cu / V纳米层复合材料在力学性能和微观结构方面保持稳定。。相反，对于暴露于7×10 ²²离子/ m ^2的高辐照通量的材料，出现了严重的辐照损害，例如明显的表面起泡，拉长的He空隙和层形貌不稳定性。此外，在Cu / V界面附近和层内观察到不对称的He气泡分布和明显的无He气泡区域。详细讨论了辐射诱发的不稳定性和He气泡形成的机理。