An Analysis of Alloy Semi-solid Rheomorphism and Numerical Simulation Method of Rheomorphology

A semi-solid rheological and analytical method technology, applied in CAD numerical modeling, electrical digital data processing, special data processing applications, etc. The effect of reducing, improving efficiency and reducing costs

Active Publication Date: 2021-09-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Judging from the situation reflected in the current data, although some achievements have been made in the description of the apparent viscosity of the semi-solid metal paste, due to the complexity of the rheological behavior of the semi-solid metal paste, it is generally used and can correctly describe the semi-solid metal paste. The uniform apparent viscosity of the rheological behavior of the material has not been established

Method used

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  • An Analysis of Alloy Semi-solid Rheomorphism and Numerical Simulation Method of Rheomorphology
  • An Analysis of Alloy Semi-solid Rheomorphism and Numerical Simulation Method of Rheomorphology
  • An Analysis of Alloy Semi-solid Rheomorphism and Numerical Simulation Method of Rheomorphology

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Embodiment 1

[0052] Viscometer is used to obtain the viscosity data of A356 aluminum alloy at different temperatures and different shear rates, as shown in Table 1, the data in Table 1 is fitted using the viscosity model of the present invention to obtain A356 aluminum alloy semi-solid slurry The relationship between the apparent viscosity of the material and the temperature and shear rate is shown in formula 1.

[0053]

[0054] A356 aluminum alloy melt viscosity changes with melt temperature and shear rate as follows figure 2shown. Comparing the fitted curve with the experimental values, it can be found that the data corresponding to the fitted viscosity model is in good agreement with the experimental values.

[0055] Table 1

[0056]

[0057] The semi-solid viscosity model of A356 aluminum alloy in Equation 1 is coupled with the basic fluid mechanics and flow equations of the simulation software, and the mathematical viscosity model of rheological deformation process is establ...

Embodiment 2

[0059] Adopt viscometer to obtain the viscosity data of AZ91D magnesium alloy under different temperatures and different shear rates, as shown in table 2, utilize viscosity model described in the present invention to figure 2 The data in is fitted, and the relationship between the apparent viscosity of the AZ91D magnesium alloy semi-solid slurry and the temperature and shear rate is obtained, as shown in formula 2.

[0060]

[0061] AZ91D magnesium alloy melt viscosity changes with melt temperature and shear rate as follows Image 6 shown. Comparing the fitted curve with the experimental values, it can be found that the data corresponding to the fitted viscosity model is in good agreement with the experimental values.

[0062] Table 2

[0063]

[0064] The semi-solid viscosity model of AZ91D magnesium alloy in formula 2 is coupled with the basic equations of fluid mechanics and flow, and the mathematical model of rheological die-casting forming process is established,...

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Abstract

The invention discloses an analysis of alloy semi-solid rheological deformation and a rheological deformation numerical simulation method. The model is simple, accurate and has few parameters, and can accurately reflect the temperature when the solid phase ratio of metal semi-solid slurry is less than 70% ( The relationship between solid phase ratio)-shear rate-viscosity accurately reflects the dynamic change of viscosity in the shear process of non-Newtonian fluid flow. The viscosity model is coupled with the basic equations of fluid mechanics and flow to establish a mathematical model of metal rheological deformation process, which can be used for numerical simulation of metal semi-solid rheological deformation, and can not only accurately obtain the flow characteristics of semi-solid slurry during rheological deformation , filling and solidification rules and defect prediction, and is conducive to the optimization of forming process and mold design, and has a good guiding role in the precise control of the whole process of semi-solid slurry preparation, transportation and rheological deformation.

Description

technical field [0001] The invention relates to a magnesium or aluminum alloy performance measurement technology, in particular to an alloy semi-solid rheological deformation analysis and rheological deformation numerical simulation method. Background technique [0002] Semi-solid forming is an advanced metal forming technology. The forming process of semi-solid slurry under pressure is complex, and the development of numerical simulation technology for slurry flow and forming process is relatively late. Since the 1990s, scholars at home and abroad have carried out numerical simulations on the forming process of semi-solid metal paste. The use of numerical simulation is helpful to optimize the semi-solid metal forming process, mold design and defect prediction, and promote the research and application of semi-solid metal forming. At present, most of the simulations of the semi-solid forming process are based on some commercial finite element or finite difference software, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/28G06F111/10G06F113/08G06F119/08G06F119/14
CPCG06F30/23G06F30/28G06F2111/10G06F2113/08G06F2119/08G06F2119/14
Inventor 祁明凡李静媛康永林张莹王继成李谷南邓蒨瑜
Owner UNIV OF SCI & TECH BEIJING
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