High concentration of vacancies induced by β″ phase formation in Al–Mg–Si alloys

Koji Inoue, Ken Takata, Kenji Kazumi, Yasuharu Shirai

Research output: Contribution to journalArticlepeer-review

Abstract

The high concentration of vacancies induced by β″ phase formation in Al–Mg–Si alloys has been observed by positron annihilation lifetime spectroscopy. These vacancies differ from quenched-in vacancies. The induced vacancies are generated inside or at the interface of the β″ phase, i.e. the β″ phase contains a high concentration of vacancies. The induced vacancies survive during the β″-to-β′ phase transformation. The migration energy of the induced vacancies is determined to be 1.83 ± 0.11 eV, which is about three times higher than that of vacancies in pure Al.

Original languageEnglish
Pages (from-to)260-270
Number of pages11
JournalPhilosophical Magazine Letters
Volume100
Issue number6
DOIs
Publication statusPublished - 2020 Jun 2

Keywords

  • Al alloys
  • Positron annihilation spectroscopy
  • vacancies

ASJC Scopus subject areas

  • Condensed Matter Physics

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