摘要
对传统的静态剪切流变实验方法进行了改进 ,研究了不同初生α相形态半固态A35 6合金的流变规律。通过对实验结果进行分析 ,提出用 6个特征参数描述半固态A35 6合金的静态剪切流变特征 :加载瞬时切变γ1,卸载瞬时恢复切变γ2 ,加载过程总切变γ3 ,卸载稳定状态下的切变γ4 ,加载时间t1及卸载稳定时间t2 。采用回归分析得到流变参数与切变应力、初生α相组织以及固相体积分数之间的关系 ,为系统评定半固态A35
Traditional static shear tests were revised so as to study the rheological behavior of semisolid A356 alloy with different microstructure morphology. Six characteristic parameters, consisting of transient shear strain γ 1 after loading, transient recovery shear strain γ 2 after unloading, total shear strain γ 3 during the period of loading, residual shear strain γ 4 after unloading, time t 1 of loading and time t 2 between the initial unloading and the steady state after unloading, were put forward on the basis of analysis of different kinds of rheological curves. The relations of characteristic parameters to shear stress, morphology of primary α phases, as well as solid fraction were obtained by regression analysis, so that the rheological behavior of semisolid A356 alloy can be evaluated systematically.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2002年第3期430-435,共6页
The Chinese Journal of Nonferrous Metals
基金
中国博士后基金资助项目 (中博基 2 0 0 0 0 31)
