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Title: Characterization and modeling of microstructural stresses in alumina

Abstract

Brittle failure is often influenced by difficult to measure and variable microstructure–scale stresses. Recent advances in photoluminescence spectroscopy (PLS), including improved confocal laser measurement and rapid spectroscopic data collection have established the potential to map stresses with microscale spatial resolution (< 2 μm). Advanced PLS was successfully used to investigate both residual and externally applied stresses in polycrystalline alumina at the microstructure scale. The measured average stresses matched those estimated from beam theory to within one standard deviation, validating the technique. Modeling the residual stresses within the microstructure produced qualitative agreement in comparison with the experimentally measured results. In conclusion, microstructure scale modeling is primed to take advantage of advanced PLS to enable its refinement and validation, eventually enabling microstructure modeling to become a predictive tool for brittle materials.

Authors:
ORCiD logo [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1476936
Report Number(s):
SAND-2018-10407J
Journal ID: ISSN 0002-7820; 668234
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 101; Journal Issue: 5; Journal ID: ISSN 0002-7820
Publisher:
American Ceramic Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; alumina; modeling/model; photoluminescence; stress

Citation Formats

Teague, Melissa C., Rodgers, Theron, Grutzik, Scott Joseph, and Meserole, Stephen. Characterization and modeling of microstructural stresses in alumina. United States: N. p., 2017. Web. doi:10.1111/jace.15369.
Teague, Melissa C., Rodgers, Theron, Grutzik, Scott Joseph, & Meserole, Stephen. Characterization and modeling of microstructural stresses in alumina. United States. doi:10.1111/jace.15369.
Teague, Melissa C., Rodgers, Theron, Grutzik, Scott Joseph, and Meserole, Stephen. Thu . "Characterization and modeling of microstructural stresses in alumina". United States. doi:10.1111/jace.15369. https://www.osti.gov/servlets/purl/1476936.
@article{osti_1476936,
title = {Characterization and modeling of microstructural stresses in alumina},
author = {Teague, Melissa C. and Rodgers, Theron and Grutzik, Scott Joseph and Meserole, Stephen},
abstractNote = {Brittle failure is often influenced by difficult to measure and variable microstructure–scale stresses. Recent advances in photoluminescence spectroscopy (PLS), including improved confocal laser measurement and rapid spectroscopic data collection have established the potential to map stresses with microscale spatial resolution (< 2 μm). Advanced PLS was successfully used to investigate both residual and externally applied stresses in polycrystalline alumina at the microstructure scale. The measured average stresses matched those estimated from beam theory to within one standard deviation, validating the technique. Modeling the residual stresses within the microstructure produced qualitative agreement in comparison with the experimentally measured results. In conclusion, microstructure scale modeling is primed to take advantage of advanced PLS to enable its refinement and validation, eventually enabling microstructure modeling to become a predictive tool for brittle materials.},
doi = {10.1111/jace.15369},
journal = {Journal of the American Ceramic Society},
number = 5,
volume = 101,
place = {United States},
year = {2017},
month = {12}
}

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