Title: Study on Microstructure and Mechanical Properties of Al-22Si-3Fe-xMn
Abstract: The microstructure and mechanical property of Fe-containing hypereutectic Al-Si alloy with different content of Mn were studied. SEM, XRD and metallographic microscrope were adopted to analyze the different phase of metalgraph as-cast. The results show that the tensile strength of the alloy changes with different content of Mn. The iron-rich phase morphology changes from elongated needle strip into herringbone, and finally into the massive with the increase of manganese content in the alloy of Al-22wt% Si-3wt% Fe-x Mn. In the amount of Mn/Fe =0.6-1, there is the block iron-rich phase of smaller grain size and smooth edges, which is best iron phase morphology. Besides, when the ration of Mn/Fe is 0.6, the alloy has the maxium tensile strength of 150 MPa.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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