Journal of Materials Research

Articles

Anisotropic atomic structure in a homogeneously deformed metallic glass

M.J. Kramera1 c1, R.T. Otta2 and D.J. Sordeleta2

a1 Materials and Engineering Physics Program, Ames Laboratory (USDOE), Ames, Iowa 50011; and Materials Science and Engineering Department, Iowa State University, Ames Iowa 50011

a2 Materials and Engineering Physics Program, Ames Laboratory (USDOE), Ames, Iowa 50011

Abstract

The anisotropic atomic structure in a Zr41.2Ti13.8Cu12.5Ni10Be22.5 metallic glass strained during uniaxial tensile creep at 598 K was studied at room temperature using high-energy x-ray diffraction. Changes in the atomic structure were examined by comparing the total scattering function [S(Q)] and the reduced pair distribution function [G(r)] of the creep to that of a companion specimen subjected to the same heat treatment only. Two-dimensional maps of the ΔS(Q) and its Fourier transformation demonstrate the distribution in the bond orientation anisotropy increases with increasing total strain. A fit of the reduced pair distribution function using a simplified two-component model suggests that the bond length changes in the deformed creep samples are not uniform.

(Received June 15 2006)

(Accepted October 04 2006)

Key Words:

  • Amorphous;
  • X-ray diffraction (XRD)

Correspondence:

c1 Address all correspondence to this author. e-mail: mjkramer@ameslab.gov

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