Fourier Thermal Analysis of the Eutectic Formed in Pb-Sn Alloys

ABSTRACTIn this work the thermal and kinetic analysis of the cooling and solidification of a near eutectic Al-Cu alloy is performed using inverse thermal and solidification kinetics analysis. The Fourier thermal analysis is applied to experimental cooling curves to obtain data on solid fraction evolution and latent heat of solidification. Inverse thermal analysis is applied to calculate the global heat transfer coefficients that allow correct simulation of the cooling of experimental probes. The free growth method is used to obtain the eutectic growth coefficients. All the obtained parameters are feed into a heat transfer-solidification kinetics model to validate the methodology and results generated from this work. It is found a relatively good agreement between experimental and predicted cooling curves which suggest that this methodology could be used to generate useful information needed to simulate eutectic solidification.

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Numerical simulation and fourier thermal analysis of solidification kinetics in high-carbon Fe-C alloys

Metallurgical and Materials Transactions B ◽

10.1007/s11663-997-0134-z ◽

1997 ◽

Vol 28 (1) ◽

pp. 115-123 ◽

Cited By ~ 19

Author(s):

E. Fras ◽

W. Kapturckiewicz ◽

A. Burbielko ◽

H. F. López

Keyword(s):

Numerical Simulation ◽

Thermal Analysis ◽

High Carbon ◽

Fourier Thermal Analysis ◽

Solidification Kinetics

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Fourier Thermal Analysis of Eutectic Al-Si Alloy with Different Sr Content

MRS Proceedings ◽

10.1557/proc-1276-13 ◽

2010 ◽

Vol 1276 ◽

Author(s):

R. Aparicio ◽

G. Barrera ◽

G. Trapaga ◽

C. Gonzalez

Keyword(s):

Thermal Analysis ◽

Base Alloy ◽

A356 Alloy ◽

Microstructural Characterization ◽

Emission Spectrometry ◽

Fourier Thermal Analysis ◽

Solidification Kinetics ◽

Kinetics Of ◽

Electrical Resistance Furnace

AbstractThe purpose of this work is to explore the capability of Fourier Thermal Analysis (FTA) to detect differences in solidification kinetics between unmodified and Sr modified eutectic Al-Si alloy obtained from the same base alloy. Experimental melts are produced in silicon carbide crucibles using an electrical resistance furnace and burdens of A356 alloy and commercial purity Si. The addition of strontium to the melts is accomplished using Al-10 pct Sr master alloy rod. Chemical composition is controlled using spark emission spectrometry. The changes in microstructure are characterized using optical microscopy. Thermal analysis are performed in cylindrical stainless steel cups coated with a thin layer of boron nitride, using two type-K thermocouples connected to a data acquisition system. Experimental cooling curves are numerically processed using FTA. Results show changes in solidification kinetics of eutectic Al-Si alloy with different Sr content. These changes, measured at the beginning and during solidification of the probes, can be related to the changes in nucleation and growth causing the differences detected during microstructural characterization of the probes.

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Extended Method of Volume Change Measurements during Solidification of Lamellar Graphite Iron

Materials Science Forum ◽

10.4028/www.scientific.net/msf.925.163 ◽

2018 ◽

Vol 925 ◽

pp. 163-170 ◽

Cited By ~ 1

Author(s):

Péter Svidró ◽

Attila Diószegi ◽

Pär G. Jönsson

Keyword(s):

Thermal Analysis ◽

Volume Change ◽

Research Work ◽

Fourier Thermal Analysis ◽

Geometrical Center ◽

Solidification Sequence ◽

Marine Industry ◽

Spherical Sample ◽

Lamellar Graphite ◽

Measurement Approach

Lamellar graphite iron (LGI) is an important technical alloy used to produce cast components for the automotive and the marine industry. The performance of the component is defined by the solidification sequence. Therefore, a lot of research work has been done in the field of solidification. The present work introduces a new measurement approach that combines advanced dilatation measurements with thermal analysis to investigate the solidification of LGI. The method involves a thermally balanced spherical sample. The temperature values are measured in the geometrical center and on the surface of the sample. The released heat of solidification is calculated by using the Fourier Thermal Analysis (FTA) method. The displacement values are measured on the surface of the sample. The volume change is calculated from the displacement data. The dilatation results clearly shows the advantage of the multidirectional measurement.

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