EFFECT OF POURING TEMPERATURE AND WATER COOLING ON THE MICROSTRUCTURE OF INGOTS PRODUCED BY COOLING SLOPE CASTING TECHNIQUE | ||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||
| Article 25, Volume 16, 16th International Conference on Applied Mechanics and Mechanical Engineering., May 2014, Pages 1-14 PDF (1.4 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/amme.2014.35556 | ||
| Authors | ||
| I. S. El-Mahallawi1; T. S. Mahmoud2; A. M. Gaafer2; F. H. Mahmoud2 | ||
| 1Mining, Petroleum and Metallurgical Department, Faculty of Engineering, Cairo University, Giza, Egypt. | ||
| 2Mechanical Engineering Department, Shoubra Faculty of Engineering, Benha University, Cairo, Egypt. | ||
| Abstract | ||
| ABSTRACT The cooling slope (CS) casting is the simplest and cheapest technique for producing feedstock materials with non-dendritic microstructure required for semi-solid metal (SSM) processing methods such as thixoforming. In the present investigation, the effect of the pouring temperature and the water cooling on the thixotropic microstructure of commercial A319 Al-Si cast alloy was studied. The results showed that increasing the pouring temperature slightly reduces the bulk porosity of the CS ingots. The ingots poured with water-cooling exhibited slightly lower porosity content than those poured with without water-cooling. Generally, it has been found that the primary α-Al grains have generally higher shape factor near the edge of ingot than the middle and center. Ingots poured with water-cooling exhibited lower grain size and shape factor than those poured without water-cooling. Increasing the pouring temperature increases the size α-Al grains. Ingots poured with water-cooling exhibited higher hardness values than those poured without water-cooling. | ||
| Keywords | ||
| Cooling Slope Casing; Microstructure; Thixotropic; Aluminium Alloys | ||
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