Microstructure Characteristics of Rapidly-Solidified/Melt-Spun AZ91 Alloy
The microstructure of AZ91 alloy processed by melt-spinning has been deeply and comprehensively investigated comparing to that conventionally cast in a steel mold. It was revealed that dendrites，distributed in the region near the surface of copper roller， and cellular grains，concentrated on the rest regions，were found with different size. In order to explain the formation of the two morphologies，the cooling rate of the rapid solidification process at the position near free surface of AZ91 melt-spun ribbon is theoretically calculated and experimentally compared to cast AZ91. The existence and distribution of lamellar eutectic and divorced eutectic in the cast AZ91 but divorced eutectic in the melt-spun AZ91 were also deeply studied.
AZ91 Rapidsolidification Microstructure Coolingrate
B.S. Wang Y.B. Liu Z.Y. Cao
The Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University, No.5988 Renmin Street, Changchun 130025, P. R. China
国内会议
南京
英文
57-67
2008-10-18（万方平台首次上网日期，不代表论文的发表时间）