چکیده مقاله
In this study, for the first time Narrow Melt Stream NMS as a relatively new semi solid technique was utilized for producing globular structures in Al/SiCP metal matrix composites Al 10 vol %SiC composite reinforced with 76 μm sized SiC particles produced by SL version of compocasting was used as the starting material These ingots were re melted and poured at 660ºC through a 10 mm sized nozzle into three cylindrical shaped cast iron moulds with an identical volume of 200 cm3 and various modulus of 1, 1 2 and 1 3 cm, located at 1500 mm under the crucible The as cast composites exhibited non dendritic microstructure which could be converted into a globular structure after partial re melting It was concluded that by decreasing the casting modulus, more spherical globules with smaller average sizes were generated Also, the decreased casting modulus resulted in a more uniform distribution of SiC particles in the matrix alloy at the expense of higher porosity levels
کلیدواژهها
نویسندگان
F. Arzandi
School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran,
F. Akhlaghi
School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran,
شیوه ارجاع
Arzandi, F. and Akhlaghi, F.,1390,Effect of castings modulus on the microstructure of Al/ SiCp metal matrix composites; fabricated via Narrow Melt Stream (NMS) method,12th Iranian Conference on Manufacturing Engineering (ICME 2010),Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس ملی مهندسی ساخت و تولید ایران6 دی 1390 · تهران