Taper barrel rheomoulding process for semi-solid slurry preparation and microstructure evolution of A356 aluminum alloy
The self-developed taper barrel rheomoulding (TBR) machine for light alloy semi-solid slurry preparation was introduced.The semi-solid slurry was obtained from the intense shearing turbulence of the alloy melt in the cause of solidification,which was further caused by the relative rotation of the internal and external taper barrel whose surface contained wale and groove.The heat transmission model of TBR process,the flow rules and the shearing model of the alloy melt were deduced.Taking A365 as experimental material,the microstructure evolution rules under different slurry preparation processes were analyzed.The results show that decreasing the pouring temperature of A365 alloy melt properly or increasing the shearing rate helps to obtain ideal semi-solid microstructure with the primary particle size of about 70 μm and the shape factor of above 0.8.
taper barrel rheomoulding semi-solid slurry preparation microstructure evolution A356 aluminum alloy
ZHANG Fan KANG Yong-lin YANG Liu-qing DING Rui-hua
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
国际会议
北京
英文
1677-1684
2010-09-16（万方平台首次上网日期，不代表论文的发表时间）