Neutron scattering characterization of microstructure in uranium silicides, ceramic composites and Ni-based alloys

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Neutron scattering has proven to be a valuable tool for studying the microstructural properties of technologically important materials. The exceptionally high penetration power of neutrons enables the investigation of bulk materials, while unusual scattering contrasts observed in many materials provide unique access to important properties. Macroscopic performance of components under extreme conditions, which ultimately determines their viability for special applications, is often closely related to microstructural properties such as particle size, residual stress and phase stability. Neutron scattering experiments performed with samples exposed to realistic environmental conditions provide direct correlation between microscopic and macroscopic properties. Neutron irradiation of uranium silicide ... continued below

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12 p.

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Richardson, J.W. Jr. October 1, 1997.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 13 times . More information about this article can be viewed below.

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  • Richardson, J.W. Jr. Argonne National Lab., IL (United States). Intense Pulsed Neutron Source Div.

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Description

Neutron scattering has proven to be a valuable tool for studying the microstructural properties of technologically important materials. The exceptionally high penetration power of neutrons enables the investigation of bulk materials, while unusual scattering contrasts observed in many materials provide unique access to important properties. Macroscopic performance of components under extreme conditions, which ultimately determines their viability for special applications, is often closely related to microstructural properties such as particle size, residual stress and phase stability. Neutron scattering experiments performed with samples exposed to realistic environmental conditions provide direct correlation between microscopic and macroscopic properties. Neutron irradiation of uranium silicide (a prospective reactor fuel), is used here as a prototypical example of in situ residual stress generation and evolution, accompanied by direct amorphization. Neutron diffraction studies at IPNS identified structural instabilities which contributed to material failure. Highly accurate measurements of residual strains in ceramic composites are used to validate computer models for stress variation with temperature and the effects of interfacial fiber coatings on residual stress. Coarsening and lattice mismatch of {gamma}{prime}-type Ni{sub 3}(Al,Si) particles in Ni-based alloys, which strongly influence coherency strains in these materials, are also measured directly using neutron scattering.

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12 p.

Notes

INIS; OSTI as DE98050373

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  • Computer aided design of high temperature materials conference, Santa Fe, NM (United States), 30 Jul - 2 Aug 1997

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  • Other: DE98050373
  • Report No.: ANL/IPNS/CP--93965
  • Report No.: CONF-9707128--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 554873
  • Archival Resource Key: ark:/67531/metadc695287

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 5:13 p.m.

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Richardson, J.W. Jr. Neutron scattering characterization of microstructure in uranium silicides, ceramic composites and Ni-based alloys, article, October 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc695287/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.