A model has been developed which simulates the deformation of single crystal austenitic stainless steels and cap-tures the effects of hydrogen on stress corrosion cracking. The model is based on the crystal plasticity theory which relates critical resolved shear stress to plastic strain and the strength of the crystal. We propose an analytical repre-sentation of hydrogen interactions with the material microstructure during deformation and simulate the effects hydrogen will have on void growth prior to fracture. Changes in the mechanical properties of the crystal prior to fracture are governed by the interaction of hydrogen atoms and ensembles of dislocations as the crystal plastically deforms and is based on the hydrogen enhanced localised plasticity (HELP) mechanism. The effects of hydrogen on void growth are considered by analysing the effect of hydrogen on the mechanical property of material bound-ing an embedded void. The model presented has been implemented numerically using the User Material (UMAT) subroutine in the finite element software (ABAQUS) and has been validated by comparing simulated results with experimental data. Influencing parameters have been varied to understand their effect and test sensitivities.

中文翻译：

---

模拟奥氏体不锈钢中氢致应力腐蚀开裂

已经开发了一个模型来模拟单晶奥氏体不锈钢的变形并捕捉氢对应力腐蚀开裂的影响。该模型基于晶体塑性理论，该理论将临界解析剪切应力与塑性应变和晶体强度联系起来。我们提出了一种在变形过程中氢与材料微观结构相互作用的分析表示，并模拟氢对断裂前空隙生长的影响。断裂前晶体机械性能的变化受氢原子和位错集合的相互作用控制，因为晶体塑性变形，并且基于氢增强局部塑性 (HELP) 机制。通过分析氢对包围嵌入空隙的材料的机械性能的影响，考虑了氢对空隙生长的影响。所提出的模型已使用有限元软件 (ABAQUS) 中的用户材料 (UMAT) 子程序进行数值实现，并已通过将模拟结果与实验数据进行比较来验证。影响参数已经改变以了解它们的效果和测试灵敏度。