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Origin of Internal Stresses in 18 cts Gold Alloys

In certain 18cts gold alloys thermo-mechanical processing may induce internal stresses resulting in undesired effects such as shape changes, cracking and failure. It is anticipated that the build-up of residual stresses in the gold alloys is directly related to the formation of the ordered AuCu phases.

The goal of this project is to establish a link between internal stresses in 3N and 5N 18 cts gold alloys at various stage of their processing steps in order to determine understand its origin and suggest paths to reduce residual stresses during manufacturing.

 

People

Marina Garcia-Gonzalez  PhD Student
Marina Garcia-Gonzalez
PhD Student

Industrial Partner

VARINOR SA

Publications

Influence of thermo-mechanical history on the ordering kinetics in 18 carat Au alloys
Garcia-Gonzalez M, Van Petegem S, Baluc N, Dupraz M, Honkimaki V, Lalire F, et al.
Acta Materialia. 2020; 191: 186-197.
https://doi.org/10.1016/j.actamat.2020.03.032

Enhanced precipitate growth at reduced temperatures during chemical ordering in deformed red gold alloys
Garcia-Gonzalez M, Van Petegem S, Baluc N, Hocine S, Dupraz M, Lalire F, et al.
Scripta Materialia. 2019; 170: 129-133.
https://doi.org/10.1016/j.scriptamat.2019.05.038

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