Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K

D. D. Yin, Q. D. Wang, C. J. Boehlert, V. Janik, Y. Gao, W. J. Ding

    Research output: Research - peer-reviewArticle

    • 18 Citations

    Abstract

    The effect of microstructure on the tensile-creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) (WGZ1152) at 573K (0.64T m) and stresses between 30MPa and 140MPa was investigated. The minimum creep rate of the peak-aged (T6) alloy was almost two orders of magnitude lower than that for a WE54-T6 (Mg-5.2Y-3.6RE-0.5Zr (wt.%)) alloy. The peak-aged condition (T6) exhibited slightly greater creep resistance than the as-cast condition. The solution treated (T4) material exhibited the lowest creep resistance. The creep stress exponent (∼5) suggested that dislocation creep was the dominant secondary creep mechanism. The minimum creep rate and time-to-fracture could be described by the Monkman-Grant equation. An in-situ creep experiment indicated that intergranular cracking was prevalent in the tertiary creep regime and the crack propagation path tended to follow the grain boundaries.

    LanguageEnglish (US)
    Pages239-247
    Number of pages9
    JournalMaterials Science and Engineering A
    Volume546
    DOIs
    StatePublished - Jun 1 2012

    Profile

    creep strength
    Creep
    tensile creep
    crack propagation
    casts
    grain boundaries
    exponents
    microstructure
    Creep resistance
    Crack propagation
    Grain boundaries
    Microstructure
    Experiments

    Keywords

    • Creep
    • In-situ
    • Intergranular cracking
    • Long period stacking ordered (LPSO)
    • Mg-RE alloy

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanical Engineering
    • Mechanics of Materials

    Cite this

    Yin, D. D., Wang, Q. D., Boehlert, C. J., Janik, V., Gao, Y., & Ding, W. J. (2012). Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. Materials Science and Engineering A, 546, 239-247. DOI: 10.1016/j.msea.2012.03.060

    Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. / Yin, D. D.; Wang, Q. D.; Boehlert, C. J.; Janik, V.; Gao, Y.; Ding, W. J.

    In: Materials Science and Engineering A, Vol. 546, 01.06.2012, p. 239-247.

    Research output: Research - peer-reviewArticle

    Yin DD, Wang QD, Boehlert CJ, Janik V, Gao Y, Ding WJ. Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. Materials Science and Engineering A. 2012 Jun 1;546:239-247. Available from, DOI: 10.1016/j.msea.2012.03.060
    Yin, D. D. ; Wang, Q. D. ; Boehlert, C. J. ; Janik, V. ; Gao, Y. ; Ding, W. J./ Creep behavior of Mg-11Y-5Gd-2Zn-0.5Zr (wt.%) at 573K. In: Materials Science and Engineering A. 2012 ; Vol. 546. pp. 239-247
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