Effect of equal-channel angular pressing on ordering kinetics and twinning in an 18-carat AuCuAg alloy

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dc.contributor.authorElibol, Çağatay
dc.contributor.authorIllgen, Christian
dc.contributor.authorColas, Damien
dc.contributor.authorBohne, Benjamin
dc.contributor.authorFritsch, Sebastian
dc.contributor.authorDietrich, Dagmar
dc.date.accessioned2024-04-04T19:22:15Z
dc.date.available2024-04-04T19:22:15Z
dc.date.issued2023
dc.departmentTAÜ, Fen Fakültesi, Malzeme Bilimi ve Teknolojileri Bölümüen_US
dc.description.abstractThe ability to modify microstructural features and the resulting properties of red gold provides an attractive potential for applications in electronics, dental devices or jewelry. In this study, the effect of severe plastic deformation by equal-channel angular pressing (ECAP) on microstructural evolution in an 18-carat AuCuAg alloy, and on the ordering kinetics during subsequent aging, is investigated. Differential scanning calorimetry measurements show that the ordering process is significantly influenced by a plastically deformed microstructure and lattice defects introduced by one or two passes of ECAP. Electron backscatter diffraction and transmission electron microscopy demonstrate that the microstructural evolution during ordering, accompanied by the formation of an L10 superstructure, substantially depends on the thermo-(mechanical) history of the material: While the undeformed material clearly shows a hierarchical structure of twins on different length scales, only a few nanotwins are observed within the strongly deformed microstructures after ECAP. Moreover, after ECAP, static recrystallization is considerably suppressed during long-term annealing at elevated temperatures close to the phase transition temperature. These results clearly highlight the potential of ECAP in combination with heat treatments for microstructural optimization of AuCuAg alloys and their applications.
dc.identifier.citationElibol, Ç., Illgen, C., Colas, D., Bohne, B., Fritsch, S., Dietrich, D. (2023). Effect of equal-channel angular pressing on ordering kinetics and twinning in an 18-carat AuCuAg alloy. Journal of Alloys and Compounds, 958.
dc.identifier.doi10.1016/j.jallcom.2023.170472
dc.identifier.issue958en_US
dc.identifier.scopus2-s2.0-85159060218
dc.identifier.urihttps://hdl.handle.net/20.500.12846/1037
dc.identifier.wosWOS:000998021800001
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectGold alloyen_US
dc.subjectEqual-channel angular pressing (ECAP)en_US
dc.subjectDifferential scanning calorimetry (DSC)en_US
dc.subjectAtomic orderingen_US
dc.subjectTwinningen_US
dc.titleEffect of equal-channel angular pressing on ordering kinetics and twinning in an 18-carat AuCuAg alloy
dc.typeArticle

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