Maximizing performance of Al-Fe alloys processed by high-pressure torsion with optimized initial microstructure and processing route

Jorge M. Cubero-Sesin, Masashi Watanabe, Zenji Horita

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The microstructure evolution of dilute Al-Fe alloys processed by High-Pressure Torsion (HPT) was studied in detail with special focus on the phase identification, phase distribution and orientation relationships between phases by high-resolution scanning/transmission electron microscopy (HR-S/TEM) and on structural analyses by X-ray diffraction (XRD). The alloys were characterized after HPT and subsequent aging treatments. Microstructures were well controlled for cast samples with 2wt%Fe containing a mixture of α-Al phase and eutectics of Al3Fe and Al6Fe. Supersaturation of Fe was achieved in the ultrafine-graincd matrix, and successive aging led to a very fine dispersion of the intermetallic phases. The electrical conductivity after the aging treatments was significantly recovered to well over 50%IACS while simultaneously increasing the yield strength above 600 MPa via precipitation of dissolved Fe. These results show that even with low Fe fraction it is possible to improve mechanical and electrical properties of A1 alloys for further advanced applications.

    Original languageEnglish
    Title of host publication8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
    PublisherJohn Wiley and Sons Inc.
    Pages3323-3328
    Number of pages6
    ISBN (Print)9781632660008
    DOIs
    Publication statusPublished - 2013
    Event8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8 - Waikoloa, HI, United States
    Duration: Aug 4 2013Aug 9 2013

    Publication series

    Name8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
    Volume4

    Other

    Other8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
    CountryUnited States
    CityWaikoloa, HI
    Period8/4/138/9/13

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials

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