51 research outputs found

    Atomistic Studies of Defect Nucleation during Nanoindentation of Au (001)

    Get PDF
    Atomistic studies are carried out to investigate the formation and evolution of defects during nanoindentation of a gold crystal. The results in this theoretical study complement the experimental investigations [J. D. Kiely and J. E. Houston, Phys. Rev. B, v57, 12588 (1998)] extremely well. The defects are produced by a three step mechanism involving nucleation, glide and reaction of Shockley partials on the {111} slip planes noncoplanar with the indented surface. We have observed that slip is in the directions along which the resolved shear stress has reached the critical value of approximately 2 GPa. The first yield occurs when the shear stresses reach this critical value on all the {111} planes involved in the formation of the defect. The phenomenon of strain hardening is observed due to the sessile stair-rods produced by the zipping of the partials. The dislocation locks produced during the second yield give rise to permanent deformation after retraction.Comment: 11 pages, 13 figures, submitted to Physical Review

    Novel Loci for Adiponectin Levels and Their Influence on Type 2 Diabetes and Metabolic Traits : A Multi-Ethnic Meta-Analysis of 45,891 Individuals

    Get PDF
    J. Kaprio, S. Ripatti ja M.-L. Lokki työryhmien jäseniä.Peer reviewe

    Scheduling evenly spaced routes in networks

    No full text
    Thesis (PhD)--University of Stellenbosch, 2004.ENGLISH ABSTRACT: Please refer to full text for abstract

    Nanometre scale textures in agate and Beltane opal

    No full text
    Mineralogical Magazine591103-10

    The Nature of Debris Loops in Deformed α Iron

    No full text
    corecore