Helium bubble influence on the deformation of aluminum is investigated via simultaneous electron backscatter diffraction and digital image correlation (DIC) during in situ tensile and compressive tests. The majority of helium is generated through the transmutation reaction ${}^{10}$B(n, ${\alpha )}^7$Li under neutron irradiation, which is carried out at 40${}^{\circ }$C to $\sim$0.3 dpa. The mesoscale deformation behaviors of aluminum matrix with and without helium bubbles are compared, and the interactions between helium bubbles and slip bands are analyzed. Helium bubbles along with other types of irradiation-induced defects (like dislocation loops and black dots) harden significantly the aluminum matrix around second-phase AlB${}_2$ particles. Slip bands cannot penetrate the areas with high-density irradiation-induced defects. They bypass such areas through cross slip, exhibiting slip band deflection. Transmission electron microscopy on irradiated materials after deformation reveals abundant helium bubbles, dislocations, dislocation loops and black dots around AlB${}_2$ particles, due to complex interactions between irradiation-induced defects with dislocations. Helium bubbles together with other types of irradiation-induced defects have pinning effects on dislocations, and pressurized helium bubbles may also punch out dislocation loops. The multiscale analyses demonstrate the helium bubble-dominated hardening.

在原位拉伸和压缩测试期间，通过同步电子背散射衍射和数字图像相关 (DIC) 研究氦气泡对铝变形的影响。大部分氦气是通过嬗变反应产生的${}^{10}$乙(n, ${\alpha )}^7$Li 在中子辐照下，在 40${}^{\circ }$对 $～$0.3 dpa。比较了含氦气泡和不含氦气泡的铝基体的中尺度变形行为，分析了氦气泡与滑移带之间的相互作用。氦气泡以及其他类型的辐射引起的缺陷（如位错环和黑点）使第二相 AlB 周围的铝基体显着硬化${}_2$粒子。滑带不能穿透具有高密度辐射诱导缺陷的区域。它们通过交叉滑移绕过这些区域，表现出滑移带偏转。变形后辐照材料的透射电子显微镜显示 AlB 周围有大量的氦气泡、位错、位错环和黑点${}_2$粒子，由于辐射诱导的缺陷与位错之间的复杂相互作用。氦气泡与其他类型的辐射引起的缺陷一起对位错具有钉扎效应，加压氦气泡也可能冲出位错环。多尺度分析证明了氦气泡主导的硬化。