JIAO Yuning
,
LIU Qingmin
,
YANG Yuangsheng
,
HU Zhuangqi
,
Institute of Meta] Research
,
Chinese Academy of Sciences
,
Shenyang
,
ChinaGAO Yunyan
,
JIA Guanglin
,
ZHANG Guozhi
,
QIAO YuanjunNortheast University
,
Shenyang
,
China Manuscript received 12 May
,
1994
金属学报(英文版)
Navier-Stokes equation and Lorentz force equation are used to calculate the fluid field of liquid metal of electromagnetic centrifugal casting (EMCC) in this paper. A field equation is given, which shows the azimuthal velocity closely relates to electrical conductivity, magnetic density, viscosity of liquid metal and radius of casting. The results show that the stationary magnetic field can effectively restrain the fluid flow and the relative velocity between liquid metal and casting mould and the velocity gradient at solid / liquid interface increases with rising magnetic density, which has a great effect on the solidification of liquid metal and crystal growth characteristics.
关键词:
fluid field of liquid metal
,
null
XING Zhanping*
,
GUO Jianting
,
HU Zhuangqi
,
AN Geying*Institute of Metal Research
,
Chinese Academy of Sciences
,
Shenyang
,
China * Harbin Institute of Technology
,
Harbin
,
China
金属学报(英文版)
Ni-50at.%A1 matrix composites containing 0 to 20v.% TiB2 particles have been successfully fabricated by HPES technique. The results show that the Vickers hardness at room temperature and the compressive yield strength from room temperature to 1000℃ of the composites increase with increasing volume fraction of the strengthening phase. Especially, the yield strength of NiAl-20TiB2 was approximately twice as high as that of unreinforced NiAl. The ductility of the composites at room temperature is also superior to the monolithic NiAl.
关键词:
intermetallic matrix composite
,
null
,
null
,
null
,
null
