Dislocation network on the curved end face of alpha precipitates in a Ti-8 wt.% Fe alloy

A complex dislocation network on the curved end face of the a precipitate in alpha Ti-8 wt.% Fe alloy was observed using transmission electron microscopy (TEM). The Burgers vectors of these dislocations were determined by g.b contrast analysis, and the planes of the dislocation loops made up of the dislocations were calculated according to a series of TEM images. The interfacial structure was well interpreted by a generalized O-element approach. The determination of the planes of the dislocation loops on the end face implies that the dislocation loops lie in irrational planes rather than slip planes. These experimental results provide useful data for further study of migration of the interface.