The interaction between dislocations and semi-coherent precipitates was discussed. The investigation showed that the precipitate was cut by the dislocations during deformation. Conventional transmission electron microscopic and high-resolution transmission electron microscopic observations demonstrated that the shearing of precipitates by dislocations occurred via multiple cutting of the precipitate. A strengthening mechanism was proposed on the basis of this observation.

Dislocation Interaction with Semicoherent Precipitates in Deformed Al-Cu-Mg-Ag Alloy B.Q.Li, F.E.Wawner: Acta Materialia, 1998, 46[15], 5483-90