TY - GEN
T1 - Thermo-mechanical properties of metals at elevated temperatures
AU - Koohbor, Behrad
AU - Valeri, Guillermo
AU - Kidane, Addis
AU - Sutton, Michael A.
N1 - Funding Information:
The financial support of ASME Applied Mechanics Division through Haythornthwaite foundation is greatly acknowledged.
Publisher Copyright:
© The Society for Experimental Mechanics, Inc. 2016.
PY - 2016
Y1 - 2016
N2 - Results from novel DIC-based experiments focused on quantifying the high temperature thermo-mechanical properties of steel alloys at elevated temperatures are presented. In these studies, the vision-based high temperature measurement system is comprised of (a) an induction coil heating system, (b) blue and white light illumination of the specimen, (c) optical band-pass notch filters for each camera centered on the blue light illumination wavelength and (d) a stereo-camera configuration for acquisition of synchronized image pairs at the desired temperature. The entire system is portable and is sufficiently flexible such that it can be employed with a wide range of specimen geometries. Each pair of stereo images acquired at a specified temperature is analyzed using three-dimensional digital image correlation (stereo-DIC). Results from laboratory studies confirm that the blue light-illumination with optical notch filtering allows high contrast images to be obtained even when the specimen is glowing white hot. The effectiveness of the system is demonstrated by successfully performing experiments to obtain the coefficient of thermal expansion of a steel alloy as a function of temperature. Additionally, technical challenges (e.g., sensitivity, spatial resolution, and repeatability of the measurements) when performing high temperature experiments with the proposed methodology will be discussed.
AB - Results from novel DIC-based experiments focused on quantifying the high temperature thermo-mechanical properties of steel alloys at elevated temperatures are presented. In these studies, the vision-based high temperature measurement system is comprised of (a) an induction coil heating system, (b) blue and white light illumination of the specimen, (c) optical band-pass notch filters for each camera centered on the blue light illumination wavelength and (d) a stereo-camera configuration for acquisition of synchronized image pairs at the desired temperature. The entire system is portable and is sufficiently flexible such that it can be employed with a wide range of specimen geometries. Each pair of stereo images acquired at a specified temperature is analyzed using three-dimensional digital image correlation (stereo-DIC). Results from laboratory studies confirm that the blue light-illumination with optical notch filtering allows high contrast images to be obtained even when the specimen is glowing white hot. The effectiveness of the system is demonstrated by successfully performing experiments to obtain the coefficient of thermal expansion of a steel alloy as a function of temperature. Additionally, technical challenges (e.g., sensitivity, spatial resolution, and repeatability of the measurements) when performing high temperature experiments with the proposed methodology will be discussed.
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U2 - 10.1007/978-3-319-22446-6_15
DO - 10.1007/978-3-319-22446-6_15
M3 - Conference contribution
AN - SCOPUS:84952333886
SN - 9783319224459
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 117
EP - 123
BT - Advancement of Optical Methods in Experimental Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
A2 - Lamberti, Luciano
A2 - Lin, Ming-Tzer
A2 - Jin, Helena
A2 - Yoshida, Sanichiro
PB - Springer New York LLC
T2 - Annual Conference on Experimental and Applied Mechanics, 2015
Y2 - 8 June 2015 through 11 June 2015
ER -