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

• Main Authors: Sabah Senouci, Azzeddine Abderrahmane Raho
• Format: Article
• Language: English
• Published: AIMS Press 2017-01-01
• Series: AIMS Materials Science
• Subjects: precipitation; diffusion; vacancies; hardening
• Online Access: http://www.aimspress.com/Materials/article/1206/fulltext.html

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.