| Title |
Effect of Ultrasonic waves on the Refining of Primary Silicon Crystals in Hypereutectic Al - Si Alloy |
| Authors |
권혁무(Hyunk Moo Kwon); 장충근(Choong Kun Chang); 김수영 (Soo Young Kim) |
| Abstract |
Hyper-eutectic Al-Si alloys were irradiated with ultrasonic waves (24KHz) to investigate the refining effects of primary silicon crystals. The relationship between the refining rate and irradiation, and the unstability and fading have been studied at the several temperature ranges and the following results were obtained : 1) The grain sizes of primary silicon crystals have been refined about the half of the orginal size and stabilized more by ultrasonic wave irradiations. 2) The most efficient temperature of melts for the irradiation was 100℃ higher than the melting point of the sample. |