MATEC Web Conf.
Volume 326, 2020The 17th International Conference on Aluminium Alloys 2020 (ICAA17)
|Number of page(s)||6|
|Section||Plenary Lecture & ECR Award Recipients|
|Published online||05 November 2020|
Detailed investigation of the shearing mechanism of β" precipitates in Al-Mg-Si alloys
1 Centre for Advanced Structural Analysis, NTNU – Norwegian University of Science and Technology — Norway.
2 Department of Structural Engineering, Faculty of Engineering, NTNU – Norwegian University of Science and Technology — Norway.
3 Materials and Nanotechnology, SINTEF Industry — Norway.
4 Department of Materials Sceince and Engineering, Faculty of Natural Sciences, NTNU – Norwegian University of Science and Technology — Norway.
5 Department of Physics, Faculty of Natural Sciences, NTNU – Norwegian University of Science and Technology — Norway.
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The mechanism behind shearing of β11 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.
© The Authors, published by EDP Sciences, 2020
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