A possible way to circumvent hydrogen embrittlement is to design alloys with features that benignly trap hydrogen. In this study, model Ni alloys with tailored \(\gamma /\gamma^{\prime}\) lattice misfit were designed using computational thermodynamics and genetic algorithms. Two alloys with distinct \(\gamma /\gamma^{\prime}\) lattice misfits were fabricated. Their microstructure was analyzed using X-ray diffraction and electron microscopy. Hydrogen diffusion and trapping behaviors were examined using electrochemical permeation, thermal desorption analysis, and glow discharge optical emission spectroscopy. Significant hydrogen diffusion retardation in both the alloys due to strong traps was observed. The low-misfit alloy exhibited less hydrogen trapping but more effective diffusion retardation.
