Effect of the supersaturation on the precipitation kinetics of the Guinier-Preston zones in Al-rich Ag alloys

Sabah Senouci; Azzeddine Abderrahmane Raho; Sabah Senouci; Azzeddine Abderrahmane Raho

doi:10.3934/matersci.2017.1.137

AIMS Materials Science

2017, Volume 4, Issue 1: 137-146. doi: 10.3934/matersci.2017.1.137

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Research article

Effect of the supersaturation on the precipitation kinetics of the Guinier-Preston zones in Al-rich Ag alloys

Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria

Received: 12 October 2016 Accepted: 04 January 2017 Published: 13 January 2017

The precipitation kinetics of the GP zones in a supersaturated solid solution depends on the level of its supersaturation which induces a driving force. The magnitude of this driving force increases with the increasing of the undercooling and the increasing of the solute supersaturation. At a given temperature, the increasing of the supersaturation accelerates the precipitation of the GP zones. In an Alxat.%Ag alloy, the transformation kinetics depends on the contribution of the driving force and on that of the thermal activation which is preponderant.
- precipitation,
- diffusion,
- vacancies,
- hardening
Citation: Sabah Senouci, Azzeddine Abderrahmane Raho. Effect of the supersaturation on the precipitation kinetics of the Guinier-Preston zones in Al-rich Ag alloys[J]. AIMS Materials Science, 2017, 4(1): 137-146. doi: 10.3934/matersci.2017.1.137

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Abstract

The precipitation kinetics of the GP zones in a supersaturated solid solution depends on the level of its supersaturation which induces a driving force. The magnitude of this driving force increases with the increasing of the undercooling and the increasing of the solute supersaturation. At a given temperature, the increasing of the supersaturation accelerates the precipitation of the GP zones. In an Alxat.%Ag alloy, the transformation kinetics depends on the contribution of the driving force and on that of the thermal activation which is preponderant.

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