Assessment of Latent Heat and Solid Fraction of Al-22Si Alloy Using Newtonian and Fourier Analysis Techniques

Computer aided cooling curve analysis (CACCA) is an online prediction tool for the determination of solidification characteristics of metals or alloys. The results of CACCA can be used to accurately determine latent heat and solid fraction needed for modeling of the solidification process. Newtonian and Fourier analysis techniques adopt a data base line fitting technique to the first derivative curve for calculation of the solid fraction and latent heat of solidification. This paper describes the theoretical and experimental procedures involved Newtonian and Fourier analysis techniques with reference to an Al-22% Si alloy. The correlations between the solid fraction and temperature/time for the alloy were determined.

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Determination of the latent heat of fusion and solid fraction evolution of metals and alloys by an improved cooling curve analysis method

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-019-08904-3 ◽

2019 ◽

Vol 140 (4) ◽

pp. 1825-1836 ◽

Cited By ~ 1

Author(s):

Carlos González-Rivera ◽

Anthony Harrup ◽

Carla Aguilar ◽

Adrián M. Amaro-Villeda ◽

Marco A. Ramírez-Argáez

Keyword(s):

Latent Heat ◽

Solid Fraction ◽

Metals And Alloys ◽

Curve Analysis ◽

Cooling Curve ◽

Heat Of Fusion ◽

Analysis Method ◽

Latent Heat Of Fusion ◽

Cooling Curve Analysis

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Comparison of Newtonian and Fourier thermal analysis techniques for calculation of latent heat and solid fraction of aluminum alloys

Metalurgija-Journal of Metallurgy ◽

10.30544/379 ◽

2004 ◽

Vol 10 (2) ◽

pp. 91-106 ◽

Cited By ~ 20

Author(s):

DARYOUSH EMADI ◽

LAURENCE V. WHITING ◽

MILE DJURDJEVIC ◽

WITOLD T. KIERKUS ◽

JERRY SOKOLOWSKI

Keyword(s):

Latent Heat ◽

Solid Fraction ◽

Curve Analysis ◽

Cooling Curve ◽

Fourier Thermal Analysis ◽

Liquid Phases ◽

Cooling Curve Analysis ◽

Curve Determination ◽

Casting Industry ◽

Thermal Analysis Techniques

The cooling curve analysis (CCA) has been used extensively in the metal casting industry, usually to predict alloy compositio n and microstructure constituents. The use of CCA can be expanded to other areas of solidification if the zero curves can be properly calculated. In this paper the Newtonian and Fourier techniques of zero curve determination are described. These techniques were developed to calculate latent heat and to determine the correlations between solid fraction and temperature/time for Al-7 wt%Si alloy. The importance of the changes in heat capacity and density of solid and liquid phases during solidification on the latent heat calculations was examined. The latent heat calculated by Computer-Aided Cooling Curve Analysis (CA-CCA) method is compared with those reported in the literature. The effect of experimental procedure and type of sampling cup on the latent heat calculations were studied for both techniques.

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