Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy

Tomoko Sano, Uchechi Okeke, Jian Yu, Carl Boehlert, Chian Fong Yen

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

    Abstract

    The welding process introduces heat, plastic deformation, and chemical variation into the weld joints and modifies the microstructure, strength, and ductility of the welded region. Samples from two plates of Al 2139-T8 alloys welded together by friction stir welding (FSW) were examined. The microstructure of the stir zone (SZ), thermomechanical affected zone (TMAZ), and the unaffected base alloy were evaluated by scanning electron microscopy (SEM) and electron backscattered diffraction. The deformation and quasi-static tensile behavior of the samples from the SZ, TMAZ, and unaffected base alloy were examined by in-situ tensile experiments in the SEM, at room temperature and at 300°C. The SZ samples showed higher elongation to failure and the unaffected base alloy exhibited the least amount of elongation. The ultimate tensile strength was determined to be lower in the TMAZ, and the yield strength increased away from the FSW region. The higher temperature tensile experiments showed a significant reduction in strength. The full results of the effect of the FSW on the Al2139-T8 microstructure and tensile behavior will be discussed in detail.

    Original languageEnglish (US)
    Title of host publicationTMS Annual Meeting
    PublisherMinerals, Metals and Materials Society
    Pages547-555
    Number of pages9
    ISBN (Print)9781118889725
    StatePublished - 2014
    Event143rd Annual Meeting and Exhibition, TMS 2014 - San Diego, CA, United States

    Other

    Other143rd Annual Meeting and Exhibition, TMS 2014
    CountryUnited States
    CitySan Diego, CA
    Period2/16/142/20/14

    Profile

    Microstructure
    microstructure
    Imino Acids
    Friction stir welding
    friction stir welding
    Common Bile Duct Diseases
    Acetanilides
    Learned Helplessness
    Welds
    Scanning electron microscopy
    Elongation
    Experiments
    Temperature
    elongation
    scanning electron microscopy
    Acriflavine
    Helsinki Declaration
    Carbamyl Phosphate
    Phaeophyta
    Electron diffraction

    Keywords

    • Al 2139
    • Friction stir weld
    • In-situ characterization

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Metals and Alloys

    Cite this

    Sano, T., Okeke, U., Yu, J., Boehlert, C., & Yen, C. F. (2014). Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy. In TMS Annual Meeting (pp. 547-555). Minerals, Metals and Materials Society.

    Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy. / Sano, Tomoko; Okeke, Uchechi; Yu, Jian; Boehlert, Carl; Yen, Chian Fong.

    TMS Annual Meeting. Minerals, Metals and Materials Society, 2014. p. 547-555.

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

    Sano, T, Okeke, U, Yu, J, Boehlert, C & Yen, CF 2014, Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy. in TMS Annual Meeting. Minerals, Metals and Materials Society, pp. 547-555, 143rd Annual Meeting and Exhibition, TMS 2014, San Diego, CA, United States, 16-20 February.
    Sano T, Okeke U, Yu J, Boehlert C, Yen CF. Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy. In TMS Annual Meeting. Minerals, Metals and Materials Society. 2014. p. 547-555.

    Sano, Tomoko; Okeke, Uchechi; Yu, Jian; Boehlert, Carl; Yen, Chian Fong / Analysis of the microstructure and properties of friction stir weld zones in the Al 2139-T8 alloy.

    TMS Annual Meeting. Minerals, Metals and Materials Society, 2014. p. 547-555.

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

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    AU - Yen,Chian Fong

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