Detailed investigation of the shearing mechanism of beta '' precipitates in Al-Mg-Si alloys

E Christiansen and CD Marioara and IG Ringdalen and R Bjorge and B Holmedal and OS Hopperstad and R Holmestad, 17TH INTERNATIONAL CONFERENCE ON ALUMINIUM ALLOYS 2020 (ICAA17), 326, 01005 (2020).

DOI: 10.1051/matecconf/202032601005

The mechanism behind shearing of beta '' precipitates in Al-Mg-Si alloys during deformation is investigated by applying advanced transmission electron microscopy (TEM) techniques and frozen phonon multislice TEM image simulations on a selection of shearing configurations. In particular, the results indicate that the needle-like precipitates are sheared several times in single matrix Burgers vector steps. The multislice image simulations suggest that shearing events are most likely achieved in single Burgers vector steps, and there are some experimental evidence that the shearing planes are the matrix glide planes.

Return to Publications page