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

Koji Inoue; Ken Takata; Kenji Kazumi; Yasuharu Shirai

doi:10.1080/09500839.2020.1751324

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

Koji Inoue, Ken Takata, Kenji Kazumi, Yasuharu Shirai

IMR - Materials Design Division

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

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 language	English
Pages (from-to)	260-270
Number of pages	11
Journal	Philosophical Magazine Letters
Volume	100
Issue number	6
DOIs	https://doi.org/10.1080/09500839.2020.1751324
Publication status	Published - 2020 Jun 2

Keywords

Al alloys
Positron annihilation spectroscopy
vacancies

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10.1080/09500839.2020.1751324

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

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.",

keywords = "Al alloys, Positron annihilation spectroscopy, vacancies",

author = "Koji Inoue and Ken Takata and Kenji Kazumi and Yasuharu Shirai",

note = "Funding Information: This work was partly supported by a Grants-in-Aid for Scientific Research foundation (24246105) from the Japan Society for thePromotion of Science (JSPS) Japan. We would like to thank Mrs. Y. Xaio for her support during the experiments and UACJ Corporation for supplying the aluminium alloy. Publisher Copyright: {\textcopyright} 2020, {\textcopyright} 2020 Informa UK Limited, trading as Taylor & Francis Group.",

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AU - Shirai, Yasuharu

N1 - Funding Information: This work was partly supported by a Grants-in-Aid for Scientific Research foundation (24246105) from the Japan Society for thePromotion of Science (JSPS) Japan. We would like to thank Mrs. Y. Xaio for her support during the experiments and UACJ Corporation for supplying the aluminium alloy. Publisher Copyright: © 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.

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N2 - 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.

AB - 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.

KW - Al alloys

KW - Positron annihilation spectroscopy

KW - vacancies

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

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Keywords

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