Conference proceeding
Dispersoid modelling in 3XXX alloys
Aluminum Alloys for Packaging II; Anaheim, California; USA; 4-8 Feb. 1996, pp.145-159
Aluminum Alloys for Packaging II (Anaheim, California, United States, 04 Feb 1996 - 08 Feb 1996)
04 Feb 1996
Abstract
A physically based model is developed to predict dispersoid evolution during preheating of 3XXX alloys. The model combines the parallel processes of nucleation, growth and coarsening, resulting in evolution equations for particle size, number density and volume fraction. Model parameters relate to diffusivity, interfacial energy, nucleation kinetics and equilibrium solvus for the Al sub 12 Mn sub 3 Si phase. Model fitting consists of using conductivity data, employing simple relationships between conductivity change and volume fraction Al sub 12 Mn sub 3 Si dispersoid precipitated. Data used in fitting and testing this model includes internal Alcoa data, and published, external results. This data contains variations in solidification rate, alloy composition, namely iron, manganese, silicon and magnesium (i.e., either 3003 or 3004), and time and temperature of thermal treatments. All of the trends in these variations are qualitatively consistent among the various data sets. A model incorporating these effects was developed for the fitting data set and the rms error of fitting was 0.046 wt.% Mn in solution. The resulting model enables predictions of the effects of process excursions, or the searching of new combinations of alloy composition and thermal practice, on the basis of physical principles and prior data.
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Details
- Title
- Dispersoid modelling in 3XXX alloys
- Creators
- J Suni - Alcoa Aluminum (United States, Pittsburgh)R Shuey - Alcoa Aluminum (United States, Pittsburgh)R Doherty - Drexel University
- Publication Details
- Aluminum Alloys for Packaging II; Anaheim, California; USA; 4-8 Feb. 1996, pp.145-159
- Conference
- Aluminum Alloys for Packaging II (Anaheim, California, United States, 04 Feb 1996 - 08 Feb 1996)
- Publisher
- The Minerals, Metals & Materials Society (TMS)
- Number of pages
- 15
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Identifiers
- 991021889907704721