Study on transient rheological behavior of semi-solid A356 alloy applied with step varied shear rate

被引：0
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作者：
Tang, Jinglin
Yin, Yajun
Fan, Qinshan
Zeng, Daben
机构：
[1] Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
[2] Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
来源：
Jinshu Xuebao/Acta Metallurgica Sinica | 2001年 / 37卷 / 10期
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摘要：
The influence of step variation of shear rate on transient rheological behavior of semi-solid A356 alloy with different morphologies of primary α-phase was explored through the use of rest time experiment by a self-designed rheometer. The initial shear rate was 367.3 s-1, the variation values of shear rate were 50.2, 83.7, 118.6, 141.8 and 195.3 s-1 respectively. Results indicated that the shear stress changed gradually from the transient peak value to its steady-state value while the shear rate altered from the given value to that of the initial shear rate. Empiric transient rheological equation, τ - τs = τΔp e-kt, which is used to describe the relations of shear stress, shear time, shear rate and morphology of primary α-phase, was obtained by ways of regression analysis.
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页码：1031 / 1034
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