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    Energy investigations on the mechanical properties of magnesium alloyed by X = C, B, N, O and vacancy

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    Type
    Article
    Authors
    Wu, Xiaozhi
    Liu, Lili
    Wang, Rui
    Gan, Liyong
    Liu, Qing
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2013-10-25
    Online Publication Date
    2013-10-25
    Print Publication Date
    2013-12
    Permanent link to this record
    http://hdl.handle.net/10754/563049
    
    Metadata
    Show full item record
    Abstract
    The generalized stacking fault (GSF) energies and surface energies of magnesium and its alloys with alloying atoms X = C, B, N, O and vacancy have been investigated using the first-principles methods. It is found that the predominant reducing effects of the alloying atoms and vacancy on the stacking fault energy are resulted from the position of them in the 1st layer near the slip plane. The stacking fault energies are nearly the same as the pure magnesium while the alloying atoms and vacancy are placed in the 2nd, 3rd, 4th, 5th and 6th layers. It has been shown that O strongly reduces the GSF energy of Mg. The alloying atoms C, B and N increase the surface energy, but O and vacancy reduce the surface energy of Mg. The ductilities of Mg and Mg alloys have been discussed based on the Rice criterion by using the ratio between surface energy and unstable stacking fault energy. © 2013 Higher Education Press and Springer-Verlag Berlin Heidelberg.
    Citation
    Wu, X.-Z., Liu, L.-L., Wang, R., Gan, L.-Y., & Liu, Q. (2013). Energy investigations on the mechanical properties of magnesium alloyed by X = C, B, N, O and vacancy. Frontiers of Materials Science, 7(4), 405–412. doi:10.1007/s11706-013-0221-9
    Sponsors
    The work was supported by the National Natural Science Foundation of China (Grant No. 11104361) and Project No. CQDXWL2012015 supported by the Fundamental Research Funds for the Central Universities.
    Publisher
    Springer Nature
    Journal
    Frontiers of Materials Science
    DOI
    10.1007/s11706-013-0221-9
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11706-013-0221-9
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division

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