Study of microstructural formation mechanism of AZ91D magnesium alloy melt during semi-solid isothermal holding

doi:10.1109/RSETE.2011.5965800

	Study of microstructural formation mechanism of AZ91D magnesium alloy melt during semi-solid isothermal holding
	Li, Yuandong; Qu, Junfeng; Xing, Bo; Ma, Ying; Chen, Tijun
	2011
关键词	Coarsening Isotherms Morphology Remote sensing Isothermal holding Magnesium alloy AZ91D Microstructure formation Self-inoculation methods Semi-solid state
DOI	10.1109/RSETE.2011.5965800
页码	6312-6315
英文摘要	The semi-solid slurry of AZ91D alloy, produced by a novel self-inoculation method, is isothermal treated. Microstructure evolution and mechanism of microstructure formation during isothermal holding are investigated. The results show that primary α-Mg grains are in small size and present polygon morphology in the slurry. During isothermal holding, the size of particles increases with increasing holding time, while the roundness turns better. But the excessive long holding time is bad for the size and roundness of particles. Deformation of dendrite arm is the primary cause of microstructure formation during pouring, meanwhile, ripening and coarsening during isothermal holding. The nucleus generated from the procedure of melt treatment by self-inoculation, and competitive nucleation in undercooled melt which is near the liquidus during isothermal holding is the main source of primary α-Mg phase. © 2011 IEEE.
会议录	2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
会议录出版者	IEEE Computer Society
语种	中文
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/116307]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou, China
推荐引用方式 GB/T 7714	Li, Yuandong,Qu, Junfeng,Xing, Bo,et al. Study of microstructural formation mechanism of AZ91D magnesium alloy melt during semi-solid isothermal holding[C]. 见:.