Using molecular dynamics simulations, peculiarities of structure rearrangement in nanofiber of intermetallic Ni3Al containing long-period, paired, thermal (nonconservative) anti-phase boundarties (APBs is investigated in the course of high-rate, tensile uniaxial loading along <001>. Four main deformation stages are determined (quasi-elastic, plastic, material flow and rupture), with each stage revealing particular features of structure transformations and energy transfer. The presence of periodic thermal planar defects in the long-period nanostructure (combined thermal anti-phase boundaries) significantly affects the onset of plastic deformation. A change in the type of thermal APBs in the long-period structure in turn affects the time to total rupture of nanofiber under plastic deformation condition. For the thermal AA 1/2 < 110 > {001}APBs, the time to total nanofiber rupture is slightly decreased, while that for the thermal AB 1/2 < 110 > {001} APBs is considerably increased.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 2, pp. 48–55, February, 2011.
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Potekaev, A.I., Starostenkov, M.D., Sinitsa, N.V. et al. Peculiar behavior of structure rearrangement in nanofiber of intermetallic Ni3Al, containing long-period paired thermal anti-phase boundaries, under high-rate tensile uniaxial loading along <001>. Russ Phys J 54, 180–188 (2011). https://doi.org/10.1007/s11182-011-9596-1
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DOI: https://doi.org/10.1007/s11182-011-9596-1