Microstructures, Simulations and Solidification Behaviors of A356 Semisolid Aluminium Alloy Prepared by Stirring Integrated Transfer-Heat Technology under Different Cooling Mediums

Zhi Yan Qiu; Bing Zhou; Shuai Lu; Ke Ping Chen; Chun Xu; Zhan Yong Wang

doi:10.4028/p-9i8e01

Paper Titles

Microstructures, Simulations and Solidification Behaviors of A356 Semisolid Aluminium Alloy Prepared by Stirring Integrated Transfer-Heat Technology under Different Cooling Mediums
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Correlating the Annealing Temperature Dependence of the Structural Inhomogeneity and the Diffusion in Zr-Ti-Cu-Ni-Be Glassy System
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Recent Progress in Research of Metal Melt Structure
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Effect of Rare Earth Ce on the Growth of Primary Al₁₃Fe₄ Phase in Al-5Fe Alloy
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Modeling Process of Manufacturing Parts Using Incremental Forming Process
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Numerical Analysis of Nucleation and Growth of Stray Grain Formation during Laser Welding Nickel-Based Single-Crystal Superalloy Part III: Kinetic and Thermodynamic Obviation of Solidification Cracking
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Microstructures, Simulations and Solidification Behaviors of A356 Semisolid Aluminium Alloy Prepared by Stirring Integrated Transfer-Heat Technology under Different Cooling Mediums

Abstract:

Based on the theory of grain refinement, the microstructures and simulations of A356 semi-solid aluminum alloy under different cooling mediums were studied. The experiment and simulation results show that water cooling is better than any other cooling mediums. Combined with the simulation of stirring and heat dissipation in SIT device, the changes of temperature field and solid fraction of the melt were studied to help understand the nucleation, growth and solidification behavior under the SIT process. During the process, the temperature field of the melt becomes relatively uniform from a larger temperature gradient and the continuous cooling speed is increased. The results also indicate that compared with traditional casting, the microstructure cooled by water are composed of refined rosiness and nearly spherical particles. With the increase of cooling degree, the average grain size decreased from 206μm to 186μm. The solid fraction increases from 4.4% to 12.2% under the no-cooling and air-cooling conditions, while it is more uniform, increasing from 5.1% to 8.8% due to the water cooling.

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Periodical:

Solid State Phenomena (Volume 330)

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3-10

DOI:

https://doi.org/10.4028/p-9i8e01

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Online since:

April 2022

Authors:

Zhi Yan Qiu, Bing Zhou*, Shuai Lu, Ke Ping Chen, Chun Xu, Zhan Yong Wang

Keywords:

A356 Aluminum Alloy, Cooling, Semi-Solid, Simulation, Solidification Behavior

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