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Review of Scientific Instruments / Volume 82 / Issue 11 / ARTICLES / General Instruments

Rev. Sci. Instrum. 82, 115101 (2011); http://dx.doi.org/10.1063/1.3657835 (6 pages)

High-temperature materials testing with full-field strain measurement: Experimental design and practice

Mark D. Novak and Frank W. Zok

Materials Department, University of California, Santa Barbara, California 93106, USA

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(Received 29 July 2011; accepted 13 October 2011; published online 3 November 2011)

Experimental characterization of the thermomechanical response of ceramic composites at very high temperatures is plagued by challenges associated with imaging and strain measurement. The problems involve illumination, heat haze, and surface contrast. Techniques that address these challenges have been developed and implemented in a laser heating facility, enabling non-contact strain measurement via digital image correlation. The thermomechanical characterization of both a Ni-based superalloy and a C/SiC composite are used to demonstrate the efficacy of experimental practices in realizing such measurements at temperatures up to 1500 °C.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. METHODS
    1. Overview
    2. Illumination and imaging
    3. Speckling
    4. Heat haze management
  3. RESULTS AND DISCUSSION
    1. Temperature limits of imaging
    2. Effects of heat haze on image correlation
    3. Thermal expansion of Inconel 625
    4. Strain mapping of C/SiC to 1500 °C
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

carbon, ceramics, correlation theory, high-temperature techniques, materials testing, nickel compounds, silicon compounds, strain measurement, superalloys, thermomechanical treatment

PACS

  • 81.70.-q

    Methods of materials testing and analysis

  • 07.10.Pz

    Instruments for strain, force, and torque

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3657835

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References


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