Abstract
The orientation relationships and interfaces between α′-Al13Cr4Si4 and the matrix in Al-Si-Cr-Mg alloy are characterized by HAADF-STEM electron microscopy. Multiple orientation relationships are found between α′-Al13Cr4Si4 and Al matrix in Al-Si-Cr-Mg and four of them are rarely common. By unraveling the atomic structure of dispersoids, the crystal model of α′-Al13Cr4Si4 is approved by the atomic-resolution for the first time. The interface we investigated proves that orientation relationships always rely on specific planes of Al matrix.
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