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Summary of the Workshop on Structural Nanomaterials (2001) / Chapter Skim
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Session 4: Structure, Properties, and Characterization
Pages 23-24

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From page 23...
... Thermal history also strongly affects mechanical behavior, possibly through the relief of the high internal strains often present in nanocrystalline metals. Professor Weertman observed that small-angle neutron scattering, positron annihilation spectroscopy, x-ray diffraction, precision density measurements, and TEM are currently among the most useful tools for characterizing nanocrystalline materials.
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From page 24...
... Adding Cr to the powders increases corrosion resistance, a factor important to the Navy.
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Key Terms

  • professor weertman
  • nanocrystalline material
  • nanocrystalline metals
  • mechanical behavior
  • average grain

  • microstructural features
  • nanocrystalline materials
  • nanocrystalline metal
  • internal strains
  • defect content

  • overarching challenge
  • unrelaxed moduli
  • thermal history
  • wide dispersion
  • useful tools

  • neutron scattering
  • positron annihilation
  • strictly speaking
  • density measurements
  • tighter grain

  • anomalously low
  • degrade mechanical
  • lower stress
  • elastic modulus
  • frequency measurements

  • characterize relevant
  • structure peculiar
  • increases corrosion
  • affects mechanical
  • relevant microstructural


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