The small fatigue crack growth behavior of an AM60 magnesium alloy

Zhe Chen, Amit Shyam, Jack Huang, Ray F. Decker, Steve E. Lebeau, Carl J. Boehlert

    Research output: Research - peer-reviewArticle

    • 4 Citations

    Abstract

    The effects of thermomechanical processing and subsequent heat treatment on the small fatigue crack growth (FCG) behavior of an AM60 (Mg-6.29Al-0.28Mn wt pct) alloy were evaluated. The effects of mechanical loading parameters, such as maximum stress and load-ratio, on the small FCG behavior were also determined. Maximum stress did not appear to affect the crack propagation rate of small cracks in the stress and crack size ranges considered. Materials with different microstructures and yield stresses, introduced by different processing conditions, showed similar crack growth rates at equivalent stress intensity factor ranges. The effect of load ratio on small crack growth rates was recorded. Fracture surface characterization suggested that the fatigue crack propagation mechanism was a mixture of transgranular and intergranular cracking. Porosity and other material defects played respective important roles in determining the fatigue crack initiation and propagation behavior.

    LanguageEnglish (US)
    Pages1045-1058
    Number of pages14
    JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
    Volume44
    Issue number2
    DOIs
    StatePublished - Feb 2013

    Profile

    Magnesium alloys
    Fatigue crack propagation
    Crack propagation
    magnesium alloys
    cracks
    Loads (forces)
    Cracks
    Processing
    crack propagation
    Crack initiation
    Stress intensity factors
    Yield stress
    Porosity
    Heat treatment
    Defects
    Microstructure
    Fatigue cracks
    stress intensity factors
    crack initiation
    heat treatment

    ASJC Scopus subject areas

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

    Cite this

    The small fatigue crack growth behavior of an AM60 magnesium alloy. / Chen, Zhe; Shyam, Amit; Huang, Jack; Decker, Ray F.; Lebeau, Steve E.; Boehlert, Carl J.

    In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 44, No. 2, 02.2013, p. 1045-1058.

    Research output: Research - peer-reviewArticle

    Chen, Zhe ; Shyam, Amit ; Huang, Jack ; Decker, Ray F. ; Lebeau, Steve E. ; Boehlert, Carl J./ The small fatigue crack growth behavior of an AM60 magnesium alloy. In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 2013 ; Vol. 44, No. 2. pp. 1045-1058
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