Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium

N. V. Dudamell, P. Hidalgo-Manrique, A. Chakkedath, Z. Chen, C. J. Boehlert, F. Gálvez, S. Yi, J. Bohlen, D. Letzig, M. T. Pérez-Prado

    Research output: Research - peer-reviewArticle

    • 23 Citations

    Abstract

    The mechanical behavior of an extruded magnesium-manganese alloy containing 1wt% of neodymium (MN11) has been investigated at temperatures ranging from room temperature to 400°C at both quasi-static and dynamic rates. Conventional ex-situ tests, carried out in compression along the extrusion axis (EA), have been combined with in-situ tests in a scanning electron microscope (SEM) in order to elucidate the effect of a rare earth (RE) addition on the dominant deformation mechanisms. An unusually large activity of twinning was observed at room temperature in a wide range of quasi-static rates. Furthermore, the twinning activity has been found to increase at temperatures around 250°C, where clear signs of dynamic strain aging (DSA) are also apparent. The enhanced twinning activity compared to conventional Mg alloys, not containing RE elements, is attributed to an increase in the critical resolved shear stress of basal slip (CRSSbasal) due to the presence of intermetallic RE-containing particles and to the Nd atoms in solid solution. The surprising decrease of the twinning activity at dynamic rates (~103s-1) may be explained by a decrease in the CRSSbasal as the intermetallic RE-containg particles and the Nd solid solution strengthening become less effective with increasing strain rate.

    LanguageEnglish (US)
    Pages220-231
    Number of pages12
    JournalMaterials Science and Engineering A
    Volume583
    DOIs
    StatePublished - 2013

    Profile

    neodymium
    magnesium alloys
    twinning
    strain rate
    slip
    rare earth elements
    Neodymium
    Twinning
    Magnesium alloys
    Strain rate
    Temperature
    intermetallics
    solid solutions
    room temperature
    temperature
    Rare earths
    Intermetallics
    Solid solutions
    manganese alloys
    precipitation hardening

    Keywords

    • Extrusion
    • Magnesium alloys
    • Mechanical behavior
    • Rare-earths
    • Slip
    • Twinning

    ASJC Scopus subject areas

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

    Cite this

    Dudamell, N. V., Hidalgo-Manrique, P., Chakkedath, A., Chen, Z., Boehlert, C. J., Gálvez, F., ... Pérez-Prado, M. T. (2013). Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. Materials Science and Engineering A, 583, 220-231. DOI: 10.1016/j.msea.2013.07.003

    Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. / Dudamell, N. V.; Hidalgo-Manrique, P.; Chakkedath, A.; Chen, Z.; Boehlert, C. J.; Gálvez, F.; Yi, S.; Bohlen, J.; Letzig, D.; Pérez-Prado, M. T.

    In: Materials Science and Engineering A, Vol. 583, 2013, p. 220-231.

    Research output: Research - peer-reviewArticle

    Dudamell, NV, Hidalgo-Manrique, P, Chakkedath, A, Chen, Z, Boehlert, CJ, Gálvez, F, Yi, S, Bohlen, J, Letzig, D & Pérez-Prado, MT 2013, 'Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium' Materials Science and Engineering A, vol 583, pp. 220-231. DOI: 10.1016/j.msea.2013.07.003
    Dudamell NV, Hidalgo-Manrique P, Chakkedath A, Chen Z, Boehlert CJ, Gálvez F et al. Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. Materials Science and Engineering A. 2013;583:220-231. Available from, DOI: 10.1016/j.msea.2013.07.003
    Dudamell, N. V. ; Hidalgo-Manrique, P. ; Chakkedath, A. ; Chen, Z. ; Boehlert, C. J. ; Gálvez, F. ; Yi, S. ; Bohlen, J. ; Letzig, D. ; Pérez-Prado, M. T./ Influence of strain rate on the twin and slip activity of a magnesium alloy containing neodymium. In: Materials Science and Engineering A. 2013 ; Vol. 583. pp. 220-231
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