The in-situ TEM observations during tensile tests, electron backscatter diffraction (EBSD) analyses and nano-indentation hardness tests were performed to investigate the hardening mechanism by the relationship between the slip planes of dislocations and the habit planes of δ-hydrides in the pure Zr. The δ-hydride of habit plane which has crystal orientation relationship of (0001)_α plane//{111}_δ plane and $<2\overline{1}\overline{1}0>$_α direction//$<110>$_δ direction, was generated in pure Zr sample. The α-Zr phase was hardened on the crystal orientation of mainly (0001)_α plane slip of dislocation. The hardening depends on crystal orientation and it was influenced by the interaction area (sheared area) of dislocations and δ-hydrides. It suggests that the hardening depends on the deference between the slip plane of dislocation and the habit plane of δ-hydride. Also, the hardening of pure Zr was influenced by the δ-hydride but not by the solid solution hydrogen. It is considered that the failure and embrittlement with the δ-hydrides generation in pure Zr is more influenced by the orientation of the long axis direction of δ-hydride than the interaction between the dislocation and δ-hydride in the α-Zr phase.

该原位期间拉伸试验，电子背散射衍射（EBSD）TEM观察分析和进行纳米压痕硬度试验通过位错的滑移面和δ-氢化物的惯习面在纯之间的关系进行调查的硬化机理锆 具有晶体取向关系为（0001）_α平面// {111} _δ平面和$<\mathrm{2个}\overline{\mathrm{1个}}\overline{\mathrm{1个}}0>$_α方向//$<110>$在纯Zr样品中产生_δ方向。α-Zr相主要在位错的（0001）_α平面滑移的晶体取向上硬化。硬化取决于晶体取向，并且受位错和δ-氢化物的相互作用区域（剪切区域）影响。这表明硬化取决于位错的滑移面和δ-氢化物的惯性面之间的差异。同样，纯Zr的硬化受δ-氢化物的影响，但不受固溶氢的影响。可以认为，纯Zr中生成δ氢化物的破坏和脆化比δ-氢化物在α-Zr相中位错与δ氢化物之间的相互作用更受δ氢化物的长轴方向的取向影响。