Constitutive Equation for Thermal Strain in the Mushy Zone during Solidification of Aluminium Alloys

Aage Stangeland; Asbjørn Mo; Dmitry G. Eskin

doi:10.4028/www.scientific.net/MSF.508.343

Paper Titles

A Brief History of the Science of Dendritic and Eutectic Growth until 1980
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Prediction of the Formation of an Equiaxed Zone Ahead of a Columnar Front in Binary Alloy Castings: Indirect and Direct Methods
p.325

Simple Analytical Models for Dendrite Arm Coarsening under High and Medium Temperature Gradients
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Effects of the Interface Curvature and Dendrite Orientation in Directional Solidification of Bulk Transparent Alloys
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Constitutive Equation for Thermal Strain in the Mushy Zone during Solidification of Aluminium Alloys
p.343

Modeling Microsegregation in Metal Alloys
p.349

Microsegregation in Steels during Dendritic Columnar Growth and Peritectic Reaction Part I: Experimental Investigation of Fe-Ni-C Alloys
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Microsegregation in Steels during Dendritic Columnar Growth and Peritectic Reaction. Part II: Modelling and Numerical Simulation. Comparison with Experimental Results
p.367

Segregation Effects and Phase Developments during Solidification of Alloy 625
p.373

HomeMaterials Science ForumMaterials Science Forum Vol. 508Constitutive Equation for Thermal Strain in the...

Constitutive Equation for Thermal Strain in the Mushy Zone during Solidification of Aluminium Alloys

Abstract:

A constitutive equation for thermal strain in the mushy zone has recently been established [1]. The parameters in this constitutive relation are in the present study determined for the commercial alloys A356, AA2024, AA6061 and AA7075 in addition to an Al-4 wt% Cu alloy by combining experimentally measured contraction of a cast sample with thermomechanical simulations. The constitutive equation for thermal strain in the mushy zone reflects that there is no thermal strain in the solid part of the mushy zone at low solid fractions and that the thermal strain in the mushy zone approaches thermal contraction in fully solid as the solid fraction increases towards one. Experiments were performed at cooling rates in the range from 2 to 5.5 °C/s. The solid fractions when the tested alloys start to contract, gs^th , are in the range from 0.63 to 0.94. Grain refinement increases gs^th for all the tested alloys.

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Periodical:

Materials Science Forum (Volume 508)

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343-348

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https://doi.org/10.4028/www.scientific.net/MSF.508.343

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Online since:

March 2006

Authors:

Aage Stangeland, Asbjørn Mo, Dmitry G. Eskin

Keywords:

Constitutive Equation, Mushy Zone, Solidification, Thermal Contraction

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