The effects of internal hydrogen on the deformation microstructures of 304L austenitic stainless steel have been characterized using electron backscattered diffraction (EBSD), transmission Kikuchi diffraction (TKD), high-resolution scanning transmission electron microscopy (HRSTEM), and nanoprobe diffraction. Samples, both thermally precharged with hydrogen and without thermal precharging, were subjected to tensile deformation of 5 and 20 pct true strain followed by multiple microscopic interrogations. Internal hydrogen produced widespread stacking faults within the as-forged initially unstrained material. While planar deformation bands developed with tensile strain in both the hydrogen-precharged and non-precharged material, the character of these bands changed with the presence of internal hydrogen. As shown by nanobeam diffraction and HRSTEM observations, in the absence of internal hydrogen, the bands were predominantly composed of twins, whereas for samples deformed in the presence of internal hydrogen, ε-martensite became more pronounced and the density of deformation bands increased. For the 20 pct strain condition, α′-martensite was observed at the intersection of ε-martensite bands in hydrogen-precharged samples, whereas in non-precharged samples α′-martensite was only observed along grain boundaries. We hypothesize that the increased prevalence of α′-martensite is a secondary effect of increased ε-martensite and deformation band density due to internal hydrogen and is not a signature of internal hydrogen itself.

使用电子反向散射衍射（EBSD），透射菊池衍射（TKD），高分辨率扫描透射电子显微镜（HRSTEM）和纳米探针衍射来表征内部氢对304L奥氏体不锈钢变形组织的影响。样品，既用氢进行热预充，又不进行热预充，均经受5和20 pct真实应变的拉伸变形，然后进行多次显微询问。内部氢在锻造的初始未应变材料内产生了广泛的堆垛层错。虽然在预充氢和未预充氢的材料中均产生具有拉伸应变的平面形变带，但这些形带的特性随内部氢的存在而变化。ε-马氏体变得更明显，并且变形带的密度增加。对于20 PCT应变条件，α '在的交叉点观察-martensite ε氢预充电样品中-martensite频带非预充电样品中，而α -martensite仅沿晶界观察到“。我们假设，α'-马氏体的增加是由于内部氢引起的ε-马氏体和变形带密度增加的次要作用，而不是内部氢本身的标志。