Journal
MATERIALS
Volume 11, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/ma11071151
Keywords
Ag-Si alloy; modification; twinning morphology; 9R structure; HRTEM
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Funding
- National Key R&D Program of China [2017YFB0305501]
- National Natural Science Foundation of China [51601003, 51401172, 51074106, 51374145, 51501023]
- Natural Science Foundation of Heilongjiang Province of China [QC2017061]
- Harbin Science and Technology Burean [2017RAQXJ066]
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The change of twinning morphology plays an important role in the modification of Al-Si alloys, which are widely used in industrial applications. However, the interpretation of this change is still insufficient. In this work, the microstructure of twins was investigated in two kinds of Al-Si alloys with different additions of Ba using high-resolution transmission electron microscopy (HRTEM). Unlike the normal {111} twin that exists in Ba-free alloy, discontinuous twins and multiple twins were observed in the Ba-containing alloy. In addition, the 9R structure formed by the dissociation of twins was firstly observed at the turning of discontinuous twins and the intersection of multiple twins in Al-Si alloys.
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