Competition for impurity atoms between defects and solid solution during high pressure torsion. (December 2019)

• Record Type: Journal Article
• Authors: Mazilkin, A.A.; Straumal, B.B.; Kilmametov, A.R.; Boll, T.; Baretzky, B.; Kogtenkova, O.A.; Korneva, A.; Zięba, P.
• Is Part Of: Scripta materialia. Number 173(2019)
• Page Start: 46
• Page End: 50
• Publication Date: 2019-12
• Subjects: Nano-crystalline metals -- Grain boundaries -- Segregation -- Cu-based alloys -- High-pressure torsion; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.08.001
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: During high-pressure torsion (HPT) the dynamic equilibrium establishes with a certain steady-state composition of the solid solution along with the grain refinement by a factor of more than thousand. The formation of such HPT steady-state in copper alloys with Co, Ag and In has been studied. If precipitates of a second phase were present in the sample before HPT, their dissolution led to the enrichment in the (Cu) matrix solid solution. If precipitates of a second phase were absent, the HPT led to the depletion in the (Cu) matrix due to the segregation in newly formed defects like grain boundaries. Graphical abstract: Unlabelled Image