Experimental Techniques

, Volume 42, Issue 5, pp 523–532 | Cite as

A New Method of Creating High-Temperature Speckle Patterns and Its Application in the Determination of the High-Temperature Mechanical Properties of Metals

  • Y.J. HuEmail author
  • Y.J. Wang
  • J.B. Chen
  • J.M. Zhu


Speckle techniques, such as DIC (Digital Image Correlation) and DSP (Digital Speckle Photography), are frequently used to determine the high-temperature mechanical properties of materials. Speckle techniques require the creation of a random speckle pattern on the surface of the specimen. The most commonly used approach to creating a high-contrast speckle pattern is to spray a layer of black paint particles on a white background. However, in a high-temperature environment, the paint particles tend to peel off or burn off. In this paper, we present an approach that uses a novel laser-engraving technology, where the created speckles will sustain temperatures as high as the melting temperature of the specimen. The size, density, depth and distribution of the speckles can be controlled to suit a particular situation. Since the pattern is part of the specimen, it will never disappear, until the melting temperature of the metal is reached. As an application, we used the technique to determine the elastic modulus of Ti up to 600°C and tungsten up to 1000°C.


DIC Speckles High-temperature testing Mechanical property of metals Material testing 


  1. 1.
    Peters WH, Ranson WFJ (1982) Digital image techniques in experimental stress analysis. Opt Eng 21(3):427–431CrossRefGoogle Scholar
  2. 2.
    Yamaguchi IJ (2000) A Laser Speckle Strain gage. J Phys E Sci Instrum 14(11):1270. CrossRefGoogle Scholar
  3. 3.
    Chiang FP, Kin CCJ (1983) Some optical techniques of displacement and strain measurements on metal surfaces. Jom-J Min Met Mat S 35(5):49–54. CrossRefGoogle Scholar
  4. 4.
    Cheng JB, Chiang FPJ (1984) Statistical analysis of whole field filtering of specklegram and its upper limit of measurement. J Opt Soc Am A 1(8):845–849. CrossRefGoogle Scholar
  5. 5.
    Jiang C, Wu YF, Jiang JF (2017) Effect of aggregate size on stress-strain behavior of concrete confined by fiber composites. Compos Struct 168:851–862CrossRefGoogle Scholar
  6. 6.
    Jiang C, Wu YF, Wu G (2014) Plastic hinge length of FRP-confined square RC columns. J Compos Constr 18(4):04014003CrossRefGoogle Scholar
  7. 7.
    Cheng JB, Chiang FPJ (1987) Fringe formation of shearing speckle interferometry. Proc SPIE 0814:124–128.
  8. 8.
    Creath K, Slettemoen GAJ (1985) A vibration-observation techniques for digital speckle-pattern interferometry. Opt Sot Am A 2(10):1629–1636CrossRefGoogle Scholar
  9. 9.
    Baik S-H, Park S-K, Kim C-J, Kim JS-Y (2001) Two-channel spatial phase shifting electronic speckle pattern interferometer. Opt Commun 192(3–6):205–211. CrossRefGoogle Scholar
  10. 10.
    Slangen P, Berwart L, Veuster CD, Golinval J-C, Lion YJ (1996) Digital speckle pattern interferometry (DSPI): a fast procedure to detect and measure vibration mode shapes. Opt Lasers Eng 25(4–5):311–321. CrossRefGoogle Scholar
  11. 11.
    Pan B, Xie HM, Hua TJ (2009) Measurement of coefficient of thermal expansion of films using digital image correlation method. Polym Test 28(1):75–83. CrossRefGoogle Scholar
  12. 12.
    Wang YG, Tong WJ (2013) A high resolution DIC technique for measuring small thermal expansion of film specimens. Opt Lasers Eng 51(1):30–33. CrossRefGoogle Scholar
  13. 13.
    Cheng JB, Yu X, Miller RG, Feng ZJ (2014) In situ strain and temperature measurement and modelling during arc welding. Sci Technol Weld Join 20(3):181–188. CrossRefGoogle Scholar
  14. 14.
    Volkl R, Fischer BJ (2004) Mechanical testing of ultra-high temperature alloys. Exp Mech 44(2):121–127. CrossRefGoogle Scholar
  15. 15.
    Meyer P, Waas AMJ (2015) Measurement of In Situ-Full-Field Strain Maps on Ceramic Matrix Composites at Elevated Temperature Using Digital Image Correlation. Exp Mech 55:795–802. CrossRefGoogle Scholar
  16. 16.
    Lyons JS, Liu J, Sutton MAJ (1996) High-temperature deformation measurement using digital image correlation. Exp Mech 36(1):64–70. CrossRefGoogle Scholar
  17. 17.
    Ma S, Pang J, Ma Q (2012) The systematic error in digital image correlation induced by self-heating of a digital camera. Meas Sci Technol 23(2):025403. CrossRefGoogle Scholar
  18. 18.
    Pan B, Wu DF, Gao JXJ (2014) High-temperature strain measurement using active imaging digital image correlation and infrared radiation heating. J Strain Anal Eng 49(4):224–232. CrossRefGoogle Scholar
  19. 19.
    Seldes AM, Arabehety CGJ (1998) Experimental Characterization of Crack Tip Deformation Fields In Alloy 718 At High Temperatures. J Eng Mater Technol 120(1):71–78. CrossRefGoogle Scholar
  20. 20.
    Su YQ, Yao XF, Wang S, Ma YJJ (2015) Improvement on measurement accuracy of high-temperature DIC by grayscale-average technique. Opt Lasers Eng 75:10–16. CrossRefGoogle Scholar
  21. 21.
    Grant BMB, Stone HJ, Withers PJ, Preuss MJ (2009) High-temperature strain field measurement using digital image correlation. J Strain Anal Eng Des 44(4):263–271. CrossRefGoogle Scholar
  22. 22.
    Xu C, Xu N, Yang L, Xiang D (2012) High temperature displacement and strain measurement using a monochromatic light illuminated stereo digital image correlation system. Meas Sci Technol 23(2012):125603Google Scholar
  23. 23.
    Song GM, Wang YJJ (2001) Microstructures and Mechanical Properties of ZrCp/W Composites at Room Temperature. Rare Metal Mater Eng 30(6):448–452 Google Scholar

Copyright information

© The Society for Experimental Mechanics, Inc 2018

Authors and Affiliations

  1. 1.School of Mechanical EngineeringUniversity of Shanghai for Science and TechnologyShanghaiChina

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