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 journalArticle

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 languageEnglish
Pages (from-to)169-173
Number of pages5
JournalScripta Materialia
Volume124
DOIs
Publication statusPublished - 2016 Nov 1
Externally publishedYes

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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