Thermo-mechanical properties of metals at elevated temperatures

Behrad Koohbor, Guillermo Valeri, Addis Kidane, Michael A. Sutton

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


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.

Original languageEnglish (US)
Title of host publicationAdvancement of Optical Methods in Experimental Mechanics - Proceedings of the 2015 Annual Conference on Experimental and Applied Mechanics
EditorsLuciano Lamberti, Ming-Tzer Lin, Helena Jin, Sanichiro Yoshida
PublisherSpringer New York LLC
Number of pages7
ISBN (Print)9783319224459
StatePublished - 2016
Externally publishedYes
EventAnnual Conference on Experimental and Applied Mechanics, 2015 - Costa Mesa, United States
Duration: Jun 8 2015Jun 11 2015

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652


ConferenceAnnual Conference on Experimental and Applied Mechanics, 2015
Country/TerritoryUnited States
CityCosta Mesa

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering


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