Mathematical modeling of particle nucleation and growth in metallic alloys

Title

Mathematical modeling of particle nucleation and growth in metallic alloys

 Author

Den Ouden, D.

Contributor

Vermolen, F.J. (mentor)
Vuik, C. (mentor)

Faculty

Electrical Engineering, Mathematics and Computer Science

 Department

Numerical Analysis

 Date

2009-12-14

 Abstract

The nucleation and growth of particles in metallic alloys has been studied thoroughly, but the effect of elastic deformation on this process remains unsolved. This work will attempt to incorporate the effect of elastic deformation in a previously proposed model for the nucleation and growth of precipitates. We adapt the KWN-models by Myhr and Grong (2000) and by Robson et al. (2003) to incorporate the effect of strain energy arising from elastic deformation on the nucleation and growth of Mg2Si particles in an aluminum alloy at constant temperature. Both finite volume and finite element methods are used to simulate the process in regions with various geometries. Simulations of the nucleation and growth of NbC particles in an HSLA steel on the cylindrical region show that the incorporation of elastic strain energies has a noticeable impact on the process. The derived quantities of nucleation and growth, such as the particle volume fraction and the particle nucleation rate, show a clear spatial correlation with the calculated strain energy.

 Subject

KWN-model
nucleation
elastic deformation
strain energy
aluminum alloy
precipitates
Mg2Si

 To reference this document use:

http://resolver.tudelft.nl/uuid:3363c3e9-8242-4f46-a3af-a45f0461e9bc

 Embargo date

2010-01-07

 Part of collection

Student theses

 Document type

master thesis

 Rights

(c) 2009 Den Ouden, D.
Files
PDF Thesis.pdf 65.97 MB
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