NIST Brand Image
  • Data Communities
  • API
  • MGI
    • Login
    View Item 
    •   Materials Data Repository Home
    • ASM Structural Materials Data Demonstration Project
    • 6061 Aluminum Alloys: Handbooks, Journal Articles, and Technical Papers
    • View Item
    •   Materials Data Repository Home
    • ASM Structural Materials Data Demonstration Project
    • 6061 Aluminum Alloys: Handbooks, Journal Articles, and Technical Papers
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    The Influence of Alloy Composition on Precipitates of the Al-Mg-Si System

    Icon
    View/Open
    IconInfluence of Alloy Composition on Precipitates in AlMgSi System.pdf (1.843Mb)
    Date
    2013-12-03
    Author
    C.D. Marioara
    S.J. Andersen
    H.W. Zandbergen
    R. Holmestad
    Metadata
    Show full item record
    Abstract
    To study how changes in solute elements affect precipitation, six Al-Mg-Si alloys aged at 175 ° C were investigated by transmission electron microscopy (TEM). In alloys with 1.3 at. pct solute, when the Si/Mg ratio exceeds 5/6, a sharp hardness peak appears after 3 hours that correlates with a high density of fine Guinier_Preston (GP) zones. A second, broader peak correlates with beta" precipitates and U phases. With high Si/Mg ratios, GP zones survive for long aging times. The beta" Mg5Si6 phase becomes very stable in the alloy with its Si/Mg ratio closest to 6/5. Deviation from this ratio increases fractions of beta" , U-phases and disordered precipitates. In Mg-rich alloys less GP zones form and the first peak is suppressed. A coarse precipitate microstructure of beta" and beta" develops, the volume fraction being much higher than in Si-rich alloys. The Mg-rich alloys overage faster. Reducing the content of solutes causes alloys with high Si/Mg ratios to have a more Mg-rich behavior. 6061 not mentioned, Al-Mg-Si always used.
    This item URI
    http://hdl.handle.net/11115/205
    Collections
    • 6061 Aluminum Alloys: Handbooks, Journal Articles, and Technical Papers

    HomeAboutFAQTerms of ServicePrivacy PolicyDisclaimerFreedom of Information ActContact Us
    NIST
     

     

    Browse

    All of Materials Data RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    HomeAboutFAQTerms of ServicePrivacy PolicyDisclaimerFreedom of Information ActContact Us
    NIST