| Abstract |
| The effects of Mn on the crystallization behaviors of Fe-bearing intermetallics in A356 alloy were studied. β-Al5FeSi phase was converted into α-Al(Fe, Mn)Si phase in response to Mn addition. As the Mn content was increased in A356 alloy, crystallization temperature of α-Al(Fe, Mn)Si phase was elevated and α-Al(Fe, Mn)Si phases were coarsened into a rod-like or skeleton-like morphology. In the alloy containing 0.40 wt.%Mn, needle-like α-Al(Fe, Mn)Si phase was newly grown nearby Si particles during solution treatment. Increasing Mn/Fe ratio in α-Al(Fe, Mn)Si phase changed crystal structure of α-Al(Fe, Mn)Si phase from BCC(disorder) into SC(B2-ordered) state. |
|
|
| Key Words |
| A356 alloy, Solidification sequence, α-Al(Fe, Mn)Si phase, B2 ordered crystal structure |
|
|
 |
|
