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Influences of Casting Pressure Conditions on the Quality and Properties of a Magnesium Cylinder Head Cover Die Casting

Wenhui LIU , Yangai LIU , Shoumei XIONG , Baicheng LIU , Y.Matsumoto , M.Murakami

材料科学技术(英文)

Casting pressure conditions have great influences on the casting defects, such as gas porosity, shrinkage porosity and gas holes. A Mg cylinder head cover die casting was used to experimentally study the influences of casting pressure, the loading time and the piston position of pressure intensifica...

关键词: Magnesium alloy , null , null , null , null

Experimental Study and Numerical Simulation of Directionally Solidified Turbine Blade Casting

Jing YU , Qingyan XU , Baicheng LIU , Jiarong LI , Hailong YUAN , Haipeng JIN

材料科学技术(英文)

The directional solidification process of turbine blade sample castings was investigated in the work. Variable withdrawal rates were used in one withdrawal process and compared with the other using uniform rate. A mathematical model for heat radiation transfer and microstructure simulation of direct...

关键词: Turbine blade casting , null , null

Numerical Simulation of Thermal Stress of Shaped Casting Based on Rheological Model

Jinwu KANG , Baicheng LIU , Shoumei XIONG

材料科学技术(英文)

In order to study the thermal stresses at the mushy zone, a three dimensional rheological model [H]-[H|N]-[N|S] including elastic, visco-elastic and visco-plastic elements was established, its algorithm and codes for finite element method were also developed. A FDM/FEM integrated analysis system of ...

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Study on numerical simulation of mold filling and heat transfer in die casting process

Liangrong JIA , Shoumei XIONG , Baicheng LIU

材料科学技术(英文)

A 3-D mathematical model considering turbulence phenomena has been established based on a computational fluid dynamics technique, so called 3-D SOLA-VOF (Solution Algorithm-Volume of Fluid), to simulate the fluid flow of mold filling process of die casting. In addition, the mathematical model for si...

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Numerical Simulation of Microporosity Evolution of Aluminum Alloy Castings

Shuyong DONG , Shoumei XIONG , Baicheng LIU

材料科学技术(英文)

A mathematical model to calculate the size and distribution of microporosities was studied and coupled with a stochastic microstructure evolution model. The model incorporates various solidification phenomena such as grain structure evolution, solidification shrinkage, interdendritic fluid flow and ...

关键词: Numerical simulation , null , null

Shrinkage behaviour of spheroidal graphite cast iron in green and dry sand molds for the benchmarking of solidification simulation

Wenzhen LI , Baicheng LIU , Jiarong LI

材料科学技术(英文)

The effects of metallurgical and processing parameters on the formation of shrinkage cavities and porosities in spheroidal graphite cast iron have been studied, considering the parameters of carbon equivalent, inoculation, casting modulus, mold type (green or dry) and pouring temperature within spec...

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3D Stochastic Modeling of Grain Structure for Aluminum Alloy Casting

Qingyan XU , Weiming FENG , Baicheng LIU

材料科学技术(英文)

A 3D stochastic modeling was carried out to simulate the dendritic grains during solidification of aluminum alloys, including time-dependent calculations for temperature field, solute redistribution in liquid, curvature of the dendritic tip, and growth anisotropy. The nucleation process was treated ...

关键词: 3D stochastic modeling , null , null

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