Pressure-driven mold filling model of aluminum alloy melt/semi-solid slurry based on rheological behavior

作     者：Zhen Ma Huarui Zhang Wei Song Xiaoyan Wu Lina Jia Hu Zhang Zhen Ma;Huarui Zhang;Wei Song;Xiaoyan Wu;Lina Jia;HU Zhang

作者机构：School of Materials Science and EngineeringBeihang UniversityBeijing100191China Qingdao Research Institute of Beihang UniversityQingdao266000China Ningbo Institute of TechnologyBeihang UniversityNingbo315832China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第39卷第4期

页      面：14-21页

核心收录：

学科分类：080503[工学-材料加工工程] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：supported financially by the National Key Research Project(No.2016YFB0300901) 

主　　题：Mold filling model Fluidity Pressure-driven Rheological behavior Aluminum alloys Semi-solid state 

摘      要：The pressure-driven mold filling ability of aluminum alloy melt/semi-solid slurry is of great significance in pressure casting processes,and the rheological behavior of the alloy has a crucial effect on the mold filling ability according to fluid *** this work,a pressure-driven mold filling model is first proposed based on the rheological behavior of the alloys.A356 alloy is employed as an example to clarify the rheological behavior of aluminum alloys,which obeys the power law model and is affected by *** rheological behavior of the alloy in semi-solid state is modelled with the coupling of shear rate and *** stop of mold filling attributes to the pressure loss which is caused by the viscosity during the flow of the melt/semi-solid *** loss caused by viscous flow and heat transfer between the alloy and the mold are calculated and coupled during the mold filling of the melt/semi-solid slurry.A pressure-driven mold filling model of aluminum alloy melt/semi-solid slurry is established based on steady-state rheological *** model successfully predicts the filling length of melt/semi-solid slurry in pressure casting *** with the experimental results,the model can provide a quantitative approach to characterize the pressure-driven mold filling ability of aluminum alloy *** model is capable of describing the stop filling behavior of other aluminum alloys in pressure casting processes with corresponding rheological parameters and heat transfer coefficient.