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    Atomic-level understanding of “asymmetric twins” in boron carbide 

    Xie, Kelvin Y.; An, Qi; Toksoy, M. Fatih; McCauley, James W.; Haber, Richard A.; Goddard III, William A.; Hemker, Kevin J. (American Physical Society, 2015)
    Recent observations of planar defects in boron carbide have been shown to deviate from perfect mirror symmetry and are referred to as “asymmetric twins.” Here, we demonstrate that these asymmetric twins are really phase ...
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    Superstrength through nanotwinning 

    An, Qi; Goddard III, William A.; Xie, Kelvin Y.; Sim, Gi-dong; Hemker, Kevin J.; Munhollon, Tyler; Toksoy, M. Fatih; Haber, Richard A. (American Chemical Society, 2016)
    The theoretical strength of a material is the minimum stress to deform or fracture the perfect single crystal material that has no defects. This theoretical strength is considered as an upper bound on the attainable strength ...