Aging behavior of ultrafine grained commercial A1-Mg-Si alloy severely deformed by ARB process

Daisuke Terada, Yoma Kaneda, Zenji Horita, Kenji Matsuda, Takumi Hamaoka, Shoichi Hirosawa, Nobuhiro Tsuji

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

    Abstract

    A commercial A1-Mg-Si alloy (6061 aluminum alloy) was used in the present study. The material was solution treated and then severely deformed by accumulative roll-bonding (ARB) process up to 6 cycles corresponding to total equivalent strain of 4.8. Subsequently, the specimens ARB-processed by various cycles were aged at 100°C and 170°C. During aging at 170°C, the increment of hardness of the ARB-processed specimen decreased with increasing the number of the ARB cycles. The hardness of the specimen ARB processed by 6 cycles decreased after aging at 170°C, though the hardness of a conventional solution-treated specimen increased greatly. On the other hand, the hardness of the specimen ARB-processed by various cycles increased significantly after aging at 100°C, and the obtained hardness was quite larger than that of the conventional materials. After aging, the strength and elongation of the solution treated specimen increased and decreased, respectively. The result shows normal tradeoff relationship between strength and elongation. However, in the ARB-processed specimens, the strength as well as elongation increased after aging. Especially, the elongation increased greatly after aging at 100°C. The results suggest that good mechanical properties can be obtained by a combination of grain refinement by severe plastic deformation process and precipitation by aging at low temperature.

    Original languageEnglish
    Title of host publication8th Pacific Rim International Congress on Advanced Materials and Processing 2013, PRICM 8
    PublisherJohn Wiley and Sons Inc.
    Pages3259-3264
    Number of pages6
    ISBN (Print)9781632660008
    Publication statusPublished - Jan 1 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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