ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The preparation of semi-solid slurry of hypereutectic Al-Si alloy by Ultrasonic Vibration(USV) has been studied. The A390 alloy melt was poured into a preheated metal cup, andsubsequently the ultrasonic vibrator was dipped into the melt and USV was imposed. The solidifiedmicrostructure of the slurry has been analyzed, and the mechanical properties of the alloy have beentested by making samples through diecasting of the slurry. The results show that the primary Siparticles of A390 alloy became finer, rounder and uniformly distributed in microstructure of A390alloy slurry if imposed with USV, and average diameter of primary Si particles was about 20μm. WithUSV, the ultimate tensile strength and the hardness of rheo-casted samples increased by over 25% andnear 50% respectively besides the elongation rose by above 100%. After heat treatment, themechanical properties were further improved. In addition, the mechanism of preparation of semi-solidslurry of hypereutectic Al-Si alloy by USV is discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/24/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.141-143.767.pdf
