Effects of ultrasonic vibration on Fe-containing intermetallic compounds of hypereutectic Al-Si alloys with high Fe content

摘要：

The effects of ultrasonic vibration (USV) on the Fe-containing intermetallic compounds of the hypereutectic AI-17Si alloys with high Fe content were studied, in which the Fe concentrations are 2％, 3％, 4％, 5％ (mass％) respectively. A large amount of long needle-like ?AI5FeSi phase coexists with a few plate-like dAI4FeSi2 phase in the matrix of AI-17Si-2Fe alloy in conventional casting process. The amount of plate-like or coarse needle-like dAI4FeSi2 phase increases with the increase of Fe content in contrast to the decrease of the long needle-like ?AI5FeSi phase in the alloys. The main Fe-containing intermetallic compound is coarse needle-like dAI4FeSi2 phase in AI-17Si-5Fe alloy. The results also show that the Fe-containing compounds are refined after USV, and they mainly exist as dAI4FeSi2 particles whose average grain size ranged from 18 urn to 46 urn, and only a small amount of ?AI5FeSi phase are left in the matrix of AI-17Si-xFe alloys. The mechanism of the effects of USV on the morphology change of Fe-containing intermetallic compounds was also discussed.

关键词： hypereutectic Al-Si alloy ultrasonic vibration Fe-containing intermetallic compound

作者: Lin Chong Wu Shusen Zhong Gu Wan Li An Ping

作者单位: State Key Lab of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China

会议类型: 国际会议

会议名称: The 11th Asian Foundry Congress(第11届亚洲铸造会议 AFC-11)

会议地点: 广州

会议语种:英文

页码: 1-7

在线出版日期: 2011-11-12（万方平台首次上网日期，不代表论文的发表时间）