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| Prediction of surface damage for Al2O3sf/2A12 composites by liquid infiltration-extrusion process |
| LIU Jian; QI Lehua; ZHOU Jiming; SU Lizheng |
| School of Mechatronics; Northwestern Polytechnical University; Xi'an 710072 |
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Cite this article:
LIU Jian QI Lehua ZHOU Jiming SU Lizheng. Prediction of surface damage for Al2O3sf/2A12 composites by liquid infiltration-extrusion process. Chin J Mater Res, 2009, 23(6): 616-621.
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Abstract A model for predicting the surface damage of Al2O3sf/2A12 composites by liquid infiltration-extrusion process was established, and the distribution of surface damage was obtained under nine groups of process parameters based on orthogonal experimental design. The influence of process parameters on the surface damage was investigated. The results show that the surface cracks usually form at the mould outlet, which results from the inhomogeneous metal flow and the partial overheating. Pressure-keeping time is the dominant parameter for controlling the surface quality. Surface damage can be effectively avoided by optimizing the process parameters. The simulated values basicly accord with the experiment results.
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Received: 31 March 2009
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| Fund: Supported by National Natural Science Foundation of China No.50575185, the National Defense Pre-Research Foundation of China No.9140A18040709HK03, and the Foundation of Key Laboratory for Advanced Materials Processing of Education, No.2008004. |
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