The microstructure of tungsten, a primary candidate for the first wall of Tokamak devices, affects the retention and permeation of hydrogen isotopes. These have a close connection to the tritium inventory. In this work, the tungsten microstructure was tuned by annealing and intense 15,700 displacements per atom (dpa) keV-W-self-ion implantation. The samples were characterized by x-ray diffraction (XRD) and scanning electron microscopy (SEM). The results reveal that the annealing treatment has little influence on the crystallite size but decreases the number of defects such as vacancies, which relates to the bulk microstructure. Moreover, ion implantation changes the sample surface from a smooth quasi-mirror to a grey morphology with various voids. The deuterium retention is suppressed by the decrease of bulk defects due to annealing, but does not present a saturation with the displacement damage increase. It is interesting to note that in permeation, the rate limiting step is bulk diffusion while the deuterium permeability is enhanced for samples with a surface modification. The possible permeation mechanisms and their relation with the sample microstructure are discussed in this work.

钨的微观结构是托卡马克装置第一壁的主要候选材料，它会影响氢同位素的保留和渗透。它们与the的库存密切相关。在这项工作中，钨的微观结构通过退火和每原子keV-W-自离子注入的15700位移的强烈位移得以调整。通过X射线衍射（XRD）和扫描电子显微镜（SEM）对样品进行表征。结果表明，退火处理对微晶尺寸几乎没有影响，但是减少了诸如空位之类的缺陷的数量，这与整体微观结构有关。此外，离子注入将样品表面从光滑的准镜变为具有各种空隙的灰色形态。氘的保留由于退火引起的体缺陷的减少而受到抑制，但是随着位移损伤的增加不会出现饱和。有趣的是，在渗透过程中，限速步骤是本体扩散，而对于具有表面修饰的样品，氘的渗透性得到了增强。在这项工作中讨论了可能的渗透机理及其与样品微观结构的关系。