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| 1 | Numerical simulation of low pressure die-casting aluminum wheel显示文摘The FDM numerical simulation software,ViewCast system,was employed to simulate the low pressure die casting(LPDC)of an aluminum wheel.By analyzing the mold-filling and solidification stage of the LPDC process,the distribution of liquid fraction,temperature field and solidification pattern of castings were studied.The potential shrinkage defects were predicted to be formed at the rim/spoke junctions,which is in consistence with the X-ray detection result.The distribution pattern of the defects has also been studied.A solution towards reducing such defects has been presented.The cooling capacity of the mold was improved by installing water pipes both in the side mold and the top mold.Analysis on the shrinkage defects under forced cooling mode proved that adding the cooling system in the mold is an effective method for reduction of shrinkage defects. | Mi Guofa Liu Xiangyu Wang Kuangfei Fu Hengzhi | 2009 | China Foundry2009，6，1： | 11 |
| 2 | Microstructure and properties of ZL205 Alloy显示文摘The microstructure, precipitate type, precipitate distribution and tensile strength of a ZL205 alloy, beforeand after ageing treatment, have been studied by means of optical microscopy and transmission electron microscopy.The results showed that the as-cast microstructure of the alloy was made up of α-Al and eutectic phase distributedat the grain boundaries. During ageing treatment, the tensile strength increased at first and then reduced with time,and the highest ultimate tensile strength was found to be around 488.2 MPa. | Mi Guofa Wang Kuangfei Gong Haijun Wang Hongwei Zeng Songyan | 2008 | China Foundry2008，5，1： | 6 |
| 3 | Numerical simulation and optimization of Al alloy cylinder body by low pressure die casting显示文摘Shrinkage defects can be formed easily at critical location during low pressure die casting (LPDC) of aluminum alloy cylinder body. It has harmful effect on the products. Mold filling and solidification process of a cylinder body was simulated by using of Z-CAST software. The casting method was improved based on the simulation results. In order to create effective feeding passage, the structure of casting was modified by changing the location of strengthening ribs at the bottom, without causing any adverse effect on the part's performance. Inserting copper billet at suitable location of the die is a valid way to create suitable solidification sequence that is beneficial to the feeding. Using these methods, the shrinkage defect was completely eliminated at the critical location. | Mi Guofa Liu Yanlei Zhao Hengtao Fu Hengzhi | 2008 | China Foundry2008，5，2： | 5 |
| 4 | Simulation of microstructural evolution in directional solidification of Ti-45at.%Al alloy using cellular automaton method显示文摘The microstructural evolution of Ti-45 at.%Al alloy during directional solidification was simulated by applying a solute diffusion controlled solidification model.The obtained results have shown that under high thermal gradients the stable primary spacing can be adjusted via branching or competitive growth.For dendritic structures formed under a high thermal gradient,the secondary dendrite arms are developed not very well in many cases due to the branching mechanism under a constrained dendritic growth condition.Furthermore,it has been observed that,with increasing pulling velocity,there exists a cell/dendrite transition region consisting of cells and dendrites,which varies with the thermal gradient in a contradicting way,i.e.increase of the thermal gradient leading to the decrease of the range of the transition region.The simulations agree reasonably well with experiment results. | Wang Kuangfei Lu Shan Mi Guofa Li Changyun FU Hengzhi | 2010 | China Foundry2010，7，1： | 1 |
| 5 | Effect of solidification condition on secondary dendrite arm spacing of the A357 alloy under counter-pressure casting显示文摘 | Guofa Mi Pu Xin Songyan Zeng | 2009 | Journal of Wuhan University of Technology - Mater Sci Ed2009，，1： | 1 |
| 6 | Microstructure and Tensile Properties of Spray-deposited IC6 Alloy显示文摘The microstructure and mechanical properties of a Ni3Al based Ni-Al-Mo superalloy-IC6 which possesses low impurity content and high density by spray deposition technique have been studied.The results indicate that the IC6 alloy has good tensile strength and elongation both at room and intermediate | Mi, Guofa Li, Zhou Tian, Shifan Zhao, Xianguo Luo, Zhiping Zeng,
Songyan Li, Qingchun | 1998 | Journal of Materials Science & Technology1998，14，2： | 0 |
| 7 | Grain refinement and mechanism of CAl_(0.5)W_(0.5) compound in Mg-Al alloys显示文摘The effect of CAl0.5W0.5(CAW) compound on the grain refinement of Mg-Al based alloys was investigated.The results show that CAW compound is an effective and active grain refiner.The grain size of binary Mg-Al alloys is more than 500 μm,and it is changed to about 110 μm with a 1 wt.% CAW addition.The hardness increased with the decease of grain size monotonously.The mechanical properties are improved by the addition.The fine grain size is mainly ascribed to the dispersed Al2CO particles,which are very potent nucleating substrates for Mg-Al alloys.The nucleation cores formed by chemical reaction directly are well-distributed in the matrix. | LIU Baozhong FAN Yanping PENG Qiuming MI Guofa WANG Limin | 2010 | Rare Metals2010，29，6： | 0 |
| 8 | MICROSTRUCTURE AND MECHANICAL PROPERTIES OF PARTICULATE REINFORCED MATRIX COMPOSITE显示文摘TiB2 - particulate- reinforced Ni3 Al composites were prepared by spray a tom-ization co-deposition technique. The reinforcement particulate can be uniformly distributedin matrix alloy, and no interaction would be found at interface between TiB, and Ni,Al.In a word, the composites possess comprehensive mechanical properties. | Mi Guofa Li Zhou Tian Shifan(Institute of Aeronautical Materials, Beijing, 100095, China)Zeng Songyan Li Qingchun(Harbin Institute of Technology, Harbin, 150001,China) | 1997 | Chinese Journal of Aeronautics1997，10，2： | 0 |
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