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Internal microstructural length scales play a fundamental role in the strength and ductility of a material. Grain boundaries in nanocrystalline structures and heterointerfaces in nanolaminates can restrict dislocation propagation and also act as a source for new dislocations, thereby affecting the detailed dynamics of dislocation-mediated plasticity.(More)
Through in situ indentation of TiN in a high-resolution transmission electron microscope, the nucleation of full as well as partial dislocations has been observed from {001} and {111} surfaces, respectively. The critical elastic strains associated with the nucleation of the dislocations were analyzed from the recorded atomic displacements, and the(More)
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We use a reaction–diffusion model to demonstrate that buried interfaces in(More)
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. ABSTRACT The combination of high strength and high radiation damage tolerance in nanolaminate composites can be achieved when the individual layers in these composites are only a few nanometers thick and therefore these materials contain a(More)
the spacing between the neighboring partials and l. This is two orders of magnitude higher than that of the preexisting dislocations and the lattice dislocations stored in the coarse twins. Such a finding suggests that decreasing the twin thickness facilitates the dislocation-TB interactions and affords more room for storage of dislocations, which sustain(More)
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