【摘要】 采用Couette型同轴双筒流变仪对半固态A356铝合金的等温稳态表观粘度进行了测试。结果表明：半固态A356合金的稳态表观粘度（η_a）随着固相分数（f_s）的增加而增加,但随剪切速率（γ）的增大而减小,当f_s达到某一临界值之后,η_a迅速增加,可用方程η_a=2．79exp（6．27f_s）γ^-0．7描述f_s,γ对η_a的影响。更多还原

【Abstract】 The rheological behavior of the semi-solid slurry of A356 aluminum alloy has been measured through a Couette-type viscometer.The experimental results show that the apparent viscosity of semi-solid A356 alloy increases with increasing the fraction solid, but decreases with increasing the shearing rate in the steady-state.When the solid fraction reached a critical value, the apparent viscosity increases rapidly.An empirical equation that shows the effect of fraction solid f_s and shearing rate γ on the apparent viscosity of semi-solid A356 alloy, η_a=2.79exp （6.27f_s） γ^-0.7, is built.更多还原