Interfacial segregation induced by severe plastic deformation in a Mg–Zn–Y alloy

Dudekula Althaf Basha; Ryoji Sahara; Hidetoshi Somekawa; Julian M. Rosalie; Alok Singh; Koichi Tsuchiya

doi:10.1016/j.scriptamat.2016.07.021

Interfacial segregation induced by severe plastic deformation in a Mg–Zn–Y alloy

Dudekula Althaf Basha, Ryoji Sahara, Hidetoshi Somekawa, Julian M. Rosalie, Alok Singh, Koichi Tsuchiya

Research output: Contribution to journal › Article

25 Citations (Scopus)

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.

Original language	English
Pages (from-to)	169-173
Number of pages	5
Journal	Scripta Materialia
Volume	124
DOIs	https://doi.org/10.1016/j.scriptamat.2016.07.021
Publication status	Published - 2016 Nov 1
Externally published	Yes

Keywords

First principles calculation
High-pressure torsion
Interface segregation
Magnesium alloys
Twinning

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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title = "Interfacial segregation induced by severe plastic deformation in a Mg–Zn–Y alloy",

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.",

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AU - Basha, Dudekula Althaf

AU - Sahara, Ryoji

AU - Somekawa, Hidetoshi

AU - Rosalie, Julian M.

AU - Singh, Alok

AU - Tsuchiya, Koichi

PY - 2016/11/1

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N2 - 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.

AB - 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.

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KW - Interface segregation

KW - Magnesium alloys

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