Transformation of microstructure after modification of A390 alloy

摘要：

A hypereutectic aluminum-silicon alloy with content of 17％Si,designed as A390,was modified.The change of microstructure was identified by optical microscopy.The results show that phosphorus can change the morphology and size of the primary silicon and control the length of needle-like eutectic silicon or dendrite.After modified by phosphorus,the primary silicon of star-like and coarse platelet is changed to polygonal with less cute angles and decreasing average size.The eutectic silicon is also changed because it grows from the tip of angles on the primary silicon and is influenced by the morphology and size of primary silicon.The eutectic silicon changes from needle-like or dendrite shape to short bars and dots with less average length.

关键词： aluminum-silicon alloys modification phosphorus primary silicon eutectic silicon

作者: ZHANG Ying YI Dan-qing LI Wang-xing REN Zhi-sen ZHAO Qun ZHANG Jun-hong

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China School of Materials Science and Engineering,Central South University,Changsha 410083,China;Zhengzhou Zhengzhou Research Institute of China Aluminum Company,Zhengzhou 450041,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）