Static atomic displacements in crystalline solid solution alloys

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Atomic size differences induce static displacements from an average alloy lattice and play an important role in controlling alloy phase stability and properties. Details of this, however, are difficult to study, as chemical order and displacements are strongly interrelated and static displacements are hard to measure. Diffuse x-ray scattering with tunable-synchrotron radiation can now measure element- specific static displacements with an accuracy of {+-}0.1 pm and can simultaneously measure local chemical order out to 20 shells or more. Ideal alloys for this are those that have previously been the most intractable: alloys with small Z contrast, alloys with only local ... continued below

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6 p.

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Ice, G.; Sparks, C.; Robertson, J.L.; Epperson, J.E. & Jiang, Xiaogang June 1, 1996.

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Description

Atomic size differences induce static displacements from an average alloy lattice and play an important role in controlling alloy phase stability and properties. Details of this, however, are difficult to study, as chemical order and displacements are strongly interrelated and static displacements are hard to measure. Diffuse x-ray scattering with tunable-synchrotron radiation can now measure element- specific static displacements with an accuracy of {+-}0.1 pm and can simultaneously measure local chemical order out to 20 shells or more. Ideal alloys for this are those that have previously been the most intractable: alloys with small Z contrast, alloys with only local order and alloys with small size differences. The combination of precise characterization of local chemical order and precise measurement of static displacement provides new information that challenges existing alloy models. This paper reports on an ongoing systematic study of static displacements in the Fe/Ni/Cr alloys and compares the observed static displacements to these predicted by current theories. Availability of more brilliant 3rd generation hard x-ray sources will greatly enhance these measurements.

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6 p.

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OSTI as DE96011955

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  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996

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  • Other: DE96011955
  • Report No.: CONF-960401--53
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 249042
  • Archival Resource Key: ark:/67531/metadc665957

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  • June 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 21, 2016, 12:32 p.m.

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Ice, G.; Sparks, C.; Robertson, J.L.; Epperson, J.E. & Jiang, Xiaogang. Static atomic displacements in crystalline solid solution alloys, article, June 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc665957/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.