期刊
SCRIPTA MATERIALIA
卷 118, 期 -, 页码 5-8出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.02.031
关键词
Electron microscopy; Aluminum alloys; Precipitation; Misfit strain
类别
资金
- Research Council of Norway (RCN)
The age-hardenable Al-Mg-Si alloy system is strengthened by needle-shaped coherent beta '' phase precipitates. Using distortion-corrected high-resolution scanning transmission electron microscopy images, we measure the considerable misfit between beta '' particles and the Al matrix. The beta '' phase is found to adapt its lattice parameters to the particle shape, distributing the strain in the Al matrix evenly in its cross-sectional plane. The measured misfits give a good match to reported atomistic simulations for a beta '' phase with composition Mg5Al2Si4. (C) 2016 Elsevier Ltd. All rights reserved.
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