Effects of Grain Refiner on the Microstructural Evolution during Making Semi-Solid Slurry of the A357 Alloy

Xiao Kang Liang; Da Quan Li; Min Luo; You Feng He; Fan Zhang; Qiang Zhu

doi:10.4028/www.scientific.net/SSP.256.88

Paper Titles

In Situ Observation of Semisolid Fe-2.5C-1.5Si Gray Cast Iron
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Macro-Observation of the Interface of the Al-22%Si-Cu/Al-7%Si-MG Bi-Metal Parts Fabricated by Thixoforging
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Semi-Solid Processing and Properties of RE-Containing Mg Alloys
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Research on Fabrication and Semisolid Processing of Semisolid Slurries of 7075 Aluminum Matrix Composites Reinforced with Nano-Sized SiC Particles
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Effects of Grain Refiner on the Microstructural Evolution during Making Semi-Solid Slurry of the A357 Alloy
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The Kinetics of Melting: Liquid Fraction versus Time
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Tensile Behavior of Semi-Solid C38 LTT Steel
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Effect of Slurry Temperature Distribution on Semi-Solid Die Casting
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Investigation on Liquid Segregation during Rheo-Casting Process Based on Eulerian-Granular Multiphase Model
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Effects of Grain Refiner on the Microstructural Evolution during Making Semi-Solid Slurry of the A357 Alloy

Abstract:

The enthalpy equilibration method is a novel technique to produce globular grain structure in semi-solid slurry preparation. In this process, the liquid is firstly poured into a metallic crucible, which possesses low thermal conductivity and high thermal capacity. Homogeneous distribution of temperature within the metallic crucible is achieved by rotating the crucible and cold down to a temperature between liquidus and solidus, determined by the requirement of solid fraction. The semi-solid slurry is then transferred to a high pressure die caster. In order to achieve a spherical microstructure morphologies in the entire slurry, effects of grain refiners, in addition to the enthalpy equilibration method, on the microstructure of the slurries of A357 alloy were investigated. Quantitative metallographic measurements were applied to evaluate microstructural evolution and processing parameters were optimized.

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Solid State Phenomena (Volume 256)

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88-93

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https://doi.org/10.4028/www.scientific.net/SSP.256.88

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Online since:

September 2016

Authors:

Xiao Kang Liang, Da Quan Li, Min Luo, You Feng He, Fan Zhang, Qiang Zhu*

Keywords:

Enthalpy Equilibration Method, Grain Refiner, Microstructure Evolution, Semisolid Slurry

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