Deformation bands in Inconel 718

Abstract

The deformation bands formed under monotonic loading in the homogenised and the aged Inconel 718 have been investigated using transmission electron microscopy. The crystallographic behaviour of the deformation bands is discussed. The orientations of the deformation bands were observed in tranmission electron micrographs as follows: two orientations of <112> bands and one orientation of <110> bands on the {O 11} plane; two orientations of <110> bands on the {DOl} plane, and three orientations of <110> bands on the {111} plane. Deformation bands were classified into <112> and <110> bands, theformer corresponding to the projections of edge traces of {111} planes, and the latter corresponding to the projections of inclined deformation {111} planes. Both twins and dislocations were observed in the deformation bands.

MST/2002