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Title: Microstructural Characterization of FeCrAl C26M Tubes

Abstract

The present report summarizes the initial nanoindentation characterization of a FeCrAl alloy, C26M. Microstructural analysis using electron backscatter diffraction showed a highly textured system with the axial surface favoring orientations near the [110] and the longitudinal surface near the [111]. A large spread of grain sizes was observed from a few μm’s to 100 μm with an average grain size of ~70 μm. Nanoindentation with a Berkovich tip measured a similar hardness and modulus of ~4.4 GPa and ~240 GPa on the two surfaces, respectively. Mounting specimens in epoxy was found to be the cause of a lower stiffness and, consequently, a lower hardness and modulus value. Spherical nanoindentation was measured on the longitudinal surface of the tube to determine the nanoindentation modulus and nanoindentation yield strength. Using a 10 μm tip, the measured modulus was ~220 GPa and the yield strength was ~1.4 GPa. Indentation with a 100 μm tip resulted in a measured modulus value of ~220 GPa and yield strength of ~1.1 GPa. Some early characterization of the differences in spherical nanoindentation response of the axial and longitudinal surfaces showed a small difference between the two, but a more detailed analysis with a stiffer mounting configuration ismore » needed to draw conclusions.« less

Authors:
 [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1463585
Report Number(s):
LA-UR-18-27489
DOE Contract Number:  
AC52-06NA25396
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Gigax, Jonathan Gregory, Weaver, Jordan S., and Li, Nan. Microstructural Characterization of FeCrAl C26M Tubes. United States: N. p., 2018. Web. doi:10.2172/1463585.
Gigax, Jonathan Gregory, Weaver, Jordan S., & Li, Nan. Microstructural Characterization of FeCrAl C26M Tubes. United States. doi:10.2172/1463585.
Gigax, Jonathan Gregory, Weaver, Jordan S., and Li, Nan. Tue . "Microstructural Characterization of FeCrAl C26M Tubes". United States. doi:10.2172/1463585. https://www.osti.gov/servlets/purl/1463585.
@article{osti_1463585,
title = {Microstructural Characterization of FeCrAl C26M Tubes},
author = {Gigax, Jonathan Gregory and Weaver, Jordan S. and Li, Nan},
abstractNote = {The present report summarizes the initial nanoindentation characterization of a FeCrAl alloy, C26M. Microstructural analysis using electron backscatter diffraction showed a highly textured system with the axial surface favoring orientations near the [110] and the longitudinal surface near the [111]. A large spread of grain sizes was observed from a few μm’s to 100 μm with an average grain size of ~70 μm. Nanoindentation with a Berkovich tip measured a similar hardness and modulus of ~4.4 GPa and ~240 GPa on the two surfaces, respectively. Mounting specimens in epoxy was found to be the cause of a lower stiffness and, consequently, a lower hardness and modulus value. Spherical nanoindentation was measured on the longitudinal surface of the tube to determine the nanoindentation modulus and nanoindentation yield strength. Using a 10 μm tip, the measured modulus was ~220 GPa and the yield strength was ~1.4 GPa. Indentation with a 100 μm tip resulted in a measured modulus value of ~220 GPa and yield strength of ~1.1 GPa. Some early characterization of the differences in spherical nanoindentation response of the axial and longitudinal surfaces showed a small difference between the two, but a more detailed analysis with a stiffer mounting configuration is needed to draw conclusions.},
doi = {10.2172/1463585},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {8}
}

Technical Report:

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