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Study of nanoprecipitates in a nickel-based superalloy using small-angle neutron scattering and transmission electron microscopy

Appl. Phys. Lett. 93, 161904 (2008); doi:10.1063/1.3002288

Published 21 October 2008

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E-Wen Huang,1 Peter K. Liaw,1 Lionel Porcar,2 Yun Liu,2 Yee-Lang Liu,3 Ji-Jung Kai,3 and Wei-Ren Chen4
1Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996-2200, USA
2National Institute of Standards and Technology (NIST) Center for Neutron Research, NIST, Gaithersburg, Maryland 20899-6100, USA
3Department of Engineering and System Science, National Tsing Hua University, Hsinchu 300, Taiwan, Republic of China
4Neutron Scattering Science Division, Spallation Neutron Source, Oak Ridge National Laboratory (ORNL), Oak Ridge, Tennessee 37831-6475, USA

Small-angle neutron scattering (SANS) experiments were performed on a Ni-based nanoprecipitate-strengthened superalloy. A theoretical model for SANS absolute intensity distribution I(Q) was presented to extract the structural properties. During the deformation process, a change in the morphology of precipitates was discovered. However, the average interprecipitate distance and the average volume of precipitates were found to remain invariant. This microstructural information resolved by SANS is in good agreement with the results obtained from the quantitative transmission-electron-microscopy image analysis. ©2008 American Institute of Physics
History: Received 3 August 2008; accepted 25 September 2008; published 21 October 2008
Permalink: http://link.aip.org/link/?APPLAB/93/161904/1
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KEYWORDS and PACS

Keywords
PACS
  • 64.70.Nd
    Structural transitions in nanoscale materials
  • 61.05.fg
    Neutron scattering (condensed matter structure determination)
  • YEAR: 2008

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0003-6951 (print)   1077-3118 (online)
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