A crystal plasticity-based finite element study is performed to understand hydrogen effects on void growth in single crystals of austenitic stainless steel. The model assumes plastic deformation is driven primarily by dislocation motion and captures the influence of hydrogen. Hydrogen effects are incorporated by assuming agreement with the hydrogen enhanced localised plasticity (HELP) mechanism. Despite experimental evidence, hydrogen effect on face centred cubic (FCC) crystals has hitherto not been considered in a numerical void growth model for a wide range of stress states. For the first time, the influence of hydrogen on void growth for different Lode parameters at single crystalline levels is investigated for a range of stress triaxialities in FCC crystals. Hydrogen was found to increase equivalent stresses and hardening responses for various stress triaxialities and Lode parameters. Hydrogen also induces higher void growth response at different stress states, and this was more pronounced at high stress triaxialities.

进行了基于晶体可塑性的有限元研究，以了解氢对奥氏体不锈钢单晶中空洞生长的影响。该模型假设塑性变形主要是由位错运动驱动的，并且捕获了氢的影响。假设与氢增强的局部可塑性（HELP）机理一致，就可以引入氢效应。尽管有实验证据，但迄今为止，在宽应力状态的数值空洞生长模型中，尚未考虑氢对面心立方（FCC）晶体的影响。对于FCC晶体中的一系列应力三轴性，首次研究了氢在单晶水平上不同Lode参数对空洞生长的影响。对于各种应力三轴性和Lode参数，发现氢会增加等效应力和硬化响应。氢在不同应力状态下也会引起更高的空洞生长响应，而在高应力三轴性条件下，这种现象更为明显。