3D imaging and quantification of porosity and intermetallic particles in strontium modified Al-Si alloys
作者： Mario De Giovanni , Jason M. Warnett , Mark A. Williams , Prakash Srirangam
DOI: 10.1016/J.JALLCOM.2017.08.146
关键词:
摘要: Al-Si alloys are widely used in the automotive and aerospace industries. Porosity is considered to be a major defect these cast alloys. In this study, effect of strontium (Sr) modification on porosity formation intermetallic quantified using X-ray tomography. Quantitative information such as average pore size, shape, distribution particle size were evaluated for Sr modified unmodified Results show that addition 400 ppm increases by 10% compared alloy. Further, equivalent diameter pores from 2 μm 18 A greater number larger found alloy, whereas small sized was significantly higher The results Al-Si-Sr intermetallics with an 4.5 μm. It can hypothesised particles act heterogeneous sites nucleation significant further growth
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