文章首次证实了高温合金中粗大的一次 γ′ 颗粒在热变形过程中会发生变形，并结合实验与模拟结果讨论了其变形机制

Scripta Mater.：镍基高温合金γ′相的变形机制 (qq.com)

Deformation mechanisms of primary  γ′ precipitates in nickel-based superalloy

https://doi.org/10.1016/j.scriptamat.2022.115109

Coarse γ′ precipitates with ordered structure (i.e. primary γ′ precipitates) residing on grain boundaries in nickel-based superalloys are generally considered to be non-deformable, they are thus being tailored to restrict grain growth during hot deformation. We demonstrate here, using both transmission electron microscopy analysis and molecular dynamics simulation, that deformation actually occurred on these precipitates and it is dominated by 1/6 <112> Shockley partial dislocation shear mechanism. Molecular dynamics simulations further reveal that all the critical strains triggering plastic deformation of primary γ′ under uniaxial tensile test are identically very low, depending on the deformation temperatures and strain rates. These findings provide new insight into the precise control of microstructure in nickel-based superalloy containing grain boundary precipitates.