Transmission electron microcopy (TEM) analysis was employed to characterize the deformation mechanisms in X-750 Ni-based superalloy. Both in-situ and ex-situ tensile tests were carried out at room temperature to observe the dislocation structure and trace the interaction between the γ'-precipitates and dislocations. The deformation mechanism was found to be planar slip which resulted in the formation of planar slip bands. This was attributed to the low stacking fault energy of X-750 alloy as well as the shearing of a high density of ordered γ'-precipitates. The shearing of γ'-precipitates occurred through an Anti-phase boundary (APB) mechanism evidenced by paired superlattice dislocations or a Stacking Fault (SF) mechanism by partial dislocations evidenced by isolated stacking faults within the γ'-precipitates.

透射电子显微镜（TEM）分析被用来表征X-750 Ni基高温合金的变形机理。在室温下进行了原位和异位拉伸试验，以观察位错结构并追踪γ'沉淀与位错之间的相互作用。发现变形机理是平面滑移，其导致平面滑移带的形成。这归因于X-750合金的低堆垛层错能以及高密度有序γ'沉淀物的剪切。γ'沉淀物的剪切是通过成对的超晶格位错证明的反相界（APB）机制或由γ'沉淀物中孤立的堆积断层证明的部分位错引起的堆垛层错（SF）机制发生的。