Shearing of γ″ precipitates and formation of planar slip bands in Inconel 718 during cyclic deformation

Fatigue of Inconel 718 at RT and 650 °C caused the formation of planar deformation bands and shearing of coherent and ordered γ″ and γ′ precipitates by paired dislocations. The paired dislocations could not cross-slip, resulting in planar slip and planar slip bands, whose spacing and width were almost independent of the cyclic plastic strain amplitude.