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Title: Use of Confocal Microscope for Environmental Tensile Mechanical Testing

Abstract

Mechanical testing in environmental chambers is typically limited to 450°C. Some specialty chambers have been designed but at a high cost. Furthermore, accurate extensometers in environmental chambers are rare and expensive to operate. A unique solution investigated in this manuscript is the mating of a confocal laser scanning microscope with a sealed environmental chamber fitted with loading clevises for mechanical testing. Such a setup allows the researcher to measure strain data at elevated temperatures in controlled environments. Utilizing a laser light source avoids problems with blackbody radiation at elevated temperatures. Setup and accuracy of the microscope are discussed concerning tensile loading. P91 boiler steel was selected for this work because of the long history of the alloy in the fossil energy industry. Optical strain uncertainty was measured between 1.6% and 3.5%. Here, other tensile parameters were satisfactorily measured within the experimental error of larger standard specimens.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [1];  [2]; ORCiD logo [2];  [2]
  1. National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, South Park, PA (United States)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Org.:
FE; USDOE
OSTI Identifier:
1509736
Grant/Contract Number:  
FE0004000
Resource Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 70; Journal Issue: 10; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Rozman, Kyle A., Nealley, W. H. H., Nakano, J., Akanda, S. R., Doğan, Ö. N., and Hawk, J. A. Use of Confocal Microscope for Environmental Tensile Mechanical Testing. United States: N. p., 2018. Web. doi:10.1007/s11837-018-3027-5.
Rozman, Kyle A., Nealley, W. H. H., Nakano, J., Akanda, S. R., Doğan, Ö. N., & Hawk, J. A. Use of Confocal Microscope for Environmental Tensile Mechanical Testing. United States. doi:10.1007/s11837-018-3027-5.
Rozman, Kyle A., Nealley, W. H. H., Nakano, J., Akanda, S. R., Doğan, Ö. N., and Hawk, J. A. Mon . "Use of Confocal Microscope for Environmental Tensile Mechanical Testing". United States. doi:10.1007/s11837-018-3027-5. https://www.osti.gov/servlets/purl/1509736.
@article{osti_1509736,
title = {Use of Confocal Microscope for Environmental Tensile Mechanical Testing},
author = {Rozman, Kyle A. and Nealley, W. H. H. and Nakano, J. and Akanda, S. R. and Doğan, Ö. N. and Hawk, J. A.},
abstractNote = {Mechanical testing in environmental chambers is typically limited to 450°C. Some specialty chambers have been designed but at a high cost. Furthermore, accurate extensometers in environmental chambers are rare and expensive to operate. A unique solution investigated in this manuscript is the mating of a confocal laser scanning microscope with a sealed environmental chamber fitted with loading clevises for mechanical testing. Such a setup allows the researcher to measure strain data at elevated temperatures in controlled environments. Utilizing a laser light source avoids problems with blackbody radiation at elevated temperatures. Setup and accuracy of the microscope are discussed concerning tensile loading. P91 boiler steel was selected for this work because of the long history of the alloy in the fossil energy industry. Optical strain uncertainty was measured between 1.6% and 3.5%. Here, other tensile parameters were satisfactorily measured within the experimental error of larger standard specimens.},
doi = {10.1007/s11837-018-3027-5},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 10,
volume = 70,
place = {United States},
year = {2018},
month = {7}
}

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Works referenced in this record:

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