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Kinetics of isothermal and non-isothermal precipitation in an Al-6at% Si alloy

Kinetics of isothermal and non-isothermal precipitation in an Al-6at% Si alloy
Kinetics of isothermal and non-isothermal precipitation in an Al-6at% Si alloy
A novel theory which describes the progress of a thermally activated reaction under isothermal and linear heating conditions is presented. It incorporates nucleation, growth and impingement and takes account of temperature dependent solubility. The model generally fits very well to isothermal calorimetry and differential scanning calorimetry data on precipitation in an Al-6 at.% Si alloy. Analysis of the data shows that two processes occur in this precipitation reaction: growth of large Si particles and growth of pre-existing small nuclei. Determination of the sizes of Si precipitates by transmission electron microscopy indicates that interfacial energy contributions are small and have a negligible influence on solubility.
0141-8610
187-199
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Zahra, A.-M.
602ec757-47a9-47dc-9739-1ba7a0e0d3db
Starink, M.J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Zahra, A.-M.
602ec757-47a9-47dc-9739-1ba7a0e0d3db

Starink, M.J. and Zahra, A.-M. (1998) Kinetics of isothermal and non-isothermal precipitation in an Al-6at% Si alloy. Philosophical Magazine, 77 (1), 187-199. (doi:10.1080/014186198254696).

Record type: Article

Abstract

A novel theory which describes the progress of a thermally activated reaction under isothermal and linear heating conditions is presented. It incorporates nucleation, growth and impingement and takes account of temperature dependent solubility. The model generally fits very well to isothermal calorimetry and differential scanning calorimetry data on precipitation in an Al-6 at.% Si alloy. Analysis of the data shows that two processes occur in this precipitation reaction: growth of large Si particles and growth of pre-existing small nuclei. Determination of the sizes of Si precipitates by transmission electron microscopy indicates that interfacial energy contributions are small and have a negligible influence on solubility.

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Published date: 1998

Identifiers

Local EPrints ID: 21672
URI: http://eprints.soton.ac.uk/id/eprint/21672
ISSN: 0141-8610
PURE UUID: 587f615c-20ea-47c5-a53a-a781de45ad12

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Date deposited: 14 Mar 2007
Last modified: 18 Mar 2021 17:54

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