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Title: Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy

Abstract

Spatially resolved strain distributions in the NiAl matrix and the ~550-nm Mo fibers of a NiAl-Mo eutectic were investigated by micro-beam X-ray diffraction. Position sensitive d-spacings for the individual phases were obtained from Laue patterns. For embedded Mo fibers, the measured elastic strain is consistent with the predicted thermal mismatch strain between the NiAl and Mo phases. However, when the NiAl matrix is etched back to expose Mo micro-pillars, the d-spacing increases to that of unconstrained Mo, indicating release of the compressive residual strain in the Mo fibers.

Authors:
 [1];  [1];  [1];  [2];  [1];  [1]
  1. ORNL
  2. Argonne National Laboratory (ANL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
936289
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 93; Journal Issue: 7; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MOLYBDENUM ALLOYS; FIBERS; NICKEL ALLOYS; ALUMINIUM ALLOYS; EUTECTICS; STRAINS; DISTRIBUTION; MATRIX MATERIALS

Citation Formats

Bei, Hongbin, Barabash, Rozaliya, Ice, Gene E, Liu, W., Tischler, Jonathan Zachary, and George, Easo P. Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy. United States: N. p., 2008. Web. doi:10.1063/1.2975371.
Bei, Hongbin, Barabash, Rozaliya, Ice, Gene E, Liu, W., Tischler, Jonathan Zachary, & George, Easo P. Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy. United States. https://doi.org/10.1063/1.2975371
Bei, Hongbin, Barabash, Rozaliya, Ice, Gene E, Liu, W., Tischler, Jonathan Zachary, and George, Easo P. 2008. "Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy". United States. https://doi.org/10.1063/1.2975371.
@article{osti_936289,
title = {Spatially resolved strain measurements in Mo-alloy micropillars by differential aperture x-ray microscopy},
author = {Bei, Hongbin and Barabash, Rozaliya and Ice, Gene E and Liu, W. and Tischler, Jonathan Zachary and George, Easo P},
abstractNote = {Spatially resolved strain distributions in the NiAl matrix and the ~550-nm Mo fibers of a NiAl-Mo eutectic were investigated by micro-beam X-ray diffraction. Position sensitive d-spacings for the individual phases were obtained from Laue patterns. For embedded Mo fibers, the measured elastic strain is consistent with the predicted thermal mismatch strain between the NiAl and Mo phases. However, when the NiAl matrix is etched back to expose Mo micro-pillars, the d-spacing increases to that of unconstrained Mo, indicating release of the compressive residual strain in the Mo fibers.},
doi = {10.1063/1.2975371},
url = {https://www.osti.gov/biblio/936289}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 7,
volume = 93,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2008},
month = {Tue Jan 01 00:00:00 EST 2008}
}