科研之友
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摘要
In this study, the pores in a die-cast AlSiMgMn alloy were reconstructed by high resolution three-dimensional (3D) X-Ray micro computed tomography (μ-CT) inspection. The crack propagation and stress distribution were simulated through finite element (FE) simulation. The results showed that the pores played a decisive role in main crack path, and the pore morphologies and locations had significant influence on the stress distribution and microcrack. The pores of lower sphericity and larger project area in tensile axis direction were prone to cause multi-microcracks and promote crack deflection. The experiment results demonstrated that the aggregation of brittle α-Fe intermetallics in the alloy also affected the main crack propagation.
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