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Title: Method for conducting in situ high-temperature digital image correlation with simultaneous synchrotron measurements under thermomechanical conditions

Abstract

This work presents a novel method of obtaining in situ strain measurements at high temperature by simultaneous digital image correlation (DIC), which provides the total strain on the specimen surface, and synchrotron x-ray diffraction (XRD), which provides lattice strains of crystalline materials. DIC at high temperature requires specialized techniques to overcome the effects of increased blackbody radiation that would otherwise overexpose the images. The technique presented herein is unique in that it can be used with a sample enclosed in an infrared heater, remotely and simultaneously with synchrotron XRD measurements. The heater included a window for camera access, and the light of the heater lamps is used as illumination. High-temperature paint is used to apply a random speckle pattern to the sample to allow the tracking of displacements and the calculation of the DIC strains. An inexpensive blue theatrical gel filter is used to block interfering visible and infrared light at high temperatures. This technique successfully produces properly exposed images at 870 °C and is expected to perform similarly at higher temperatures. The average strains measured by DIC were validated by an analytical calculation of the theoretical strain. Simultaneous DIC and XRD strain measurements of Inconel 718 (IN718) tensile testmore » specimens were performed under thermal and mechanical loads and evaluated. Finally, this approach uses the fact that with DIC, the total strain is measured, including plastic strain, while with XRD, only elastic strain is captured. The observed differences were discussed with respect to the effective deformation mechanisms.« less

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [3];  [4];  [2];  [3];  [4]; ORCiD logo [1]
  1. Univ. of Central Florida, Orlando, FL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  3. PSL Research Univ., Évry (France). MINES ParisTech
  4. Inst. of Materials Research, Köln (Germany). German Aerospace Center
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
National Science Foundation (NSF); German Science Foundation (DFG); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1604143
Alternate Identifier(s):
OSTI ID: 1603196
Grant/Contract Number:  
AC02-06CH11357; DMR 1337758; OISE 1460045; SFBTRR 103
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 91; Journal Issue: 3; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English

Citation Formats

Rossmann, Lin, Sarley, Brooke, Hernandez, Johnathan, Kenesei, Peter, Köster, Alain, Wischek, Janine, Almer, Jonathan, Maurel, Vincent, Bartsch, Marion, and Raghavan, Seetha. Method for conducting in situ high-temperature digital image correlation with simultaneous synchrotron measurements under thermomechanical conditions. United States: N. p., 2020. Web. doi:10.1063/1.5124496.
Rossmann, Lin, Sarley, Brooke, Hernandez, Johnathan, Kenesei, Peter, Köster, Alain, Wischek, Janine, Almer, Jonathan, Maurel, Vincent, Bartsch, Marion, & Raghavan, Seetha. Method for conducting in situ high-temperature digital image correlation with simultaneous synchrotron measurements under thermomechanical conditions. United States. doi:10.1063/1.5124496.
Rossmann, Lin, Sarley, Brooke, Hernandez, Johnathan, Kenesei, Peter, Köster, Alain, Wischek, Janine, Almer, Jonathan, Maurel, Vincent, Bartsch, Marion, and Raghavan, Seetha. Thu . "Method for conducting in situ high-temperature digital image correlation with simultaneous synchrotron measurements under thermomechanical conditions". United States. doi:10.1063/1.5124496.
@article{osti_1604143,
title = {Method for conducting in situ high-temperature digital image correlation with simultaneous synchrotron measurements under thermomechanical conditions},
author = {Rossmann, Lin and Sarley, Brooke and Hernandez, Johnathan and Kenesei, Peter and Köster, Alain and Wischek, Janine and Almer, Jonathan and Maurel, Vincent and Bartsch, Marion and Raghavan, Seetha},
abstractNote = {This work presents a novel method of obtaining in situ strain measurements at high temperature by simultaneous digital image correlation (DIC), which provides the total strain on the specimen surface, and synchrotron x-ray diffraction (XRD), which provides lattice strains of crystalline materials. DIC at high temperature requires specialized techniques to overcome the effects of increased blackbody radiation that would otherwise overexpose the images. The technique presented herein is unique in that it can be used with a sample enclosed in an infrared heater, remotely and simultaneously with synchrotron XRD measurements. The heater included a window for camera access, and the light of the heater lamps is used as illumination. High-temperature paint is used to apply a random speckle pattern to the sample to allow the tracking of displacements and the calculation of the DIC strains. An inexpensive blue theatrical gel filter is used to block interfering visible and infrared light at high temperatures. This technique successfully produces properly exposed images at 870 °C and is expected to perform similarly at higher temperatures. The average strains measured by DIC were validated by an analytical calculation of the theoretical strain. Simultaneous DIC and XRD strain measurements of Inconel 718 (IN718) tensile test specimens were performed under thermal and mechanical loads and evaluated. Finally, this approach uses the fact that with DIC, the total strain is measured, including plastic strain, while with XRD, only elastic strain is captured. The observed differences were discussed with respect to the effective deformation mechanisms.},
doi = {10.1063/1.5124496},
journal = {Review of Scientific Instruments},
number = 3,
volume = 91,
place = {United States},
year = {2020},
month = {3}
}

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