In this paper, we focus mainly on evaluating the anisotropy evolution in Zircaloy-4 tubes with respect to hydrogen pickup which tends to affect the deformation behavior and fracture elongation due to embrittlement phenomenon induced by Zr hydrides. To capture the complex material behaviors of the H-charged (166 ppm) Zircaloy-4 tubes, we have applied the Hill anisotropic yield criterion by carrying out several material tests, such as the axial tensile, ring tensile, and axial crushing tests, for calibrating the anisotropic coefficients based on the directional strength and strain ratios. It makes possible to simulate the directional flow curves of the as-received and the H-charged Zircaloy-4 tubes based on the directional strength ratios along the axial and hoop directions, respectively, as well as a variation in deformation modes in the axial crushing test with substantial accuracy.

在本文中，我们主要集中于评估Zircaloy-4管在氢吸收方面的各向异性演变，该趋势倾向于影响因Zr氢化物引起的脆化现象而引起的变形行为和断裂伸长。为了捕获充氢（166 ppm）的Zircaloy-4管的复杂材料性能，我们通过进行几种材料测试（例如轴向拉伸，环向拉伸和轴向压碎测试）来应用Hill各向异性屈服准则，根据方向强度和应变比校准各向异性系数。分别基于沿轴向和环向的方向强度比，可以模拟已接收和充H的Zircaloy-4管的方向流动曲线，