%0 Journal Article
%J Physical Review B
%D 2009
%T Strain dependence of peak widths of reciprocal- and real-space distribution functions of metallic glasses from in situ x-ray scattering and molecular dynamics simulations
%A Ott, R. T.
%A Mendelev, M. I.
%A Besser, M. F.
%A Kramer, M. J.
%A Almer, J.
%A Sordelet, D. J.
%K amorphous solids
%K copper alloys
%K deformation
%K elastic deformation
%K metallic glasses
%K model
%K molecular dynamics method
%K structural defects
%K x-ray scattering
%K zirconium alloys
%M ISI:000269638800016
%P 064101
%R 10.1103/Physrevb.80.064101
%U ://000269638800016
%V 80
%X We have examined the relationship between the variance in the atomic-level hydrostatic pressure, <>(1/2), and the widths of the first peaks in the reciprocal- and real-space distribution functions for elastically deformed metallic glasses. In situ synchrotron x-ray scattering studies performed on a binary Cu64.5Zr35.5 glass subject to uniaxial loading reveal that the width of the first peak in the reduced-pair distribution function is dependent on the different elastic responses of the partial-pair correlations. Molecular dynamics (MD) simulations of the same binary glass, as well as a single-component glass, subject to hydrostatic deformation show that the widths of the first peaks in the partial-pair distribution functions are affected by length-scale-dependent changes in the relative atomic separation in the first nearest-neighbor shell. Moreover, the MD simulations show that the strain dependencies of the partial-pair peak widths do not necessarily match the strain-dependence of <>(1/2). The results suggest that the widths of the peaks in the reciprocal- and real-space functions are not solely dependent on <>(1/2) but rather are also affected by the atomic rearrangements associated with elastic deformation.
%Z 492EXTimes Cited:0Cited References Count:27
%8 08/01
%@ 1098-0121