Interfacial segregation induced by severe plastic deformation in a Mg–Zn–Y alloy. (November 2016)

• Record Type: Journal Article
• Authors: Basha, Dudekula Althaf; Sahara, Ryoji; Somekawa, Hidetoshi; Rosalie, Julian M.; Singh, Alok; Tsuchiya, Koichi
• Is Part Of: Scripta materialia. Volume 124(2016)
• Page Start: 169
• Page End: 173
• Publication Date: 2016-11
• Subjects: Magnesium alloys -- Interface segregation -- Twinning -- High-pressure torsion -- First principles calculation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.07.021
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: For the first time, we report here segregation of Zn atoms to twin boundaries formed under 9% compression at room temperature (RT) in a Mg-3Zn-0.5Y (in at%) alloy. The wrought processed (textured) alloy was severely plastically deformed (SPD) through high pressure torsion (HPT) at RT. Zn segregation (2 to 4 at%) was observed on newly formed boundaries, such as twin boundaries (formed on compression only in HPT), low angle boundaries formed by deformation and grain boundaries due to recrystallization. First principles calculations performed on low angle boundaries shows that Zn atom prefers to segregate to the dislocations in the boundary. Graphical abstract: