Research Article
A Review Study on the Main Sources of Porosity in Al-Si Cast Alloys
Figure 21
Backscattered electron images of porosity formation in B319 alloy: (a) bifilm oxides, (b) thin films of oxides, (c) Al-Sr-O oxide platelet, (d) optical micrograph of MgO, (e) x-ray image showing general distribution of O2 in the matrix-white arrows point to cavities, (f) precipitation of TiB2 particles, (g) and (h) addition of Al2O3 particulates/dispersoids.
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