@article { author = {Ezat, Nawal and Ibrahim, Osama}, title = {Microstructure Investigation of Using Slope Plate Casting Hypereutectic Al-Si Alloy}, journal = {Engineering and Technology Journal}, volume = {31}, number = {3A}, pages = {400-415}, year = {2013}, publisher = {University of Technology-Iraq}, issn = {1681-6900}, eissn = {2412-0758}, doi = {10.30684/etj.31.3A.2}, abstract = {In this work, the effects of the overheating temperature and tilt angle on the microstructure and hardness of a hypereutectic Al-23%Si alloy were investigated. Al-23%Si melt was overheated to (760, 790, 820 and 850) ºC and poured onto slope plate continuously cooled with water circulation underneath, with various tilt angles (40, 50, 60)º using a constant cooling length (300 mm(. After, the melt became a semi-solid; the slurry was then filled the mould and completely solidified. Slope plate samples were reheated to a semi-solid temperature (550)ºC for (10 min) and then quenched in water. Microstructural images analysis showed that the grain size and the shape factor of (β-Si) phase were decreased with increasing of the overheating temperature and tilt angles, on other hand, the volume fraction of (β-Si) phase was increased. The results of the reheating route showed that the grain size of (β-Si) phase was slightly increased after reheating at all overheating temperatures and tilting angles. On other side, the shape factor was improved, and the volume fraction of (β-Si) phase was decreased, as compared with slope plate results.}, keywords = {Slope platecasting,Hypereutectic Al,Si alloy,Reheating}, url = {https://etj.uotechnology.edu.iq/article_81926.html}, eprint = {https://etj.uotechnology.edu.iq/article_81926_86c6582e4e88afd5db753e7758364c83.pdf} }