Paper Titles
Ball SAW Sensors for Safety and Reliability of Fuel Cell Technologies
p.48
Optically Encoded Smart Dust from DBR Porous Silicon
p.53
Development of Biaxial Servo Controlled Fatigue Testing System
p.57
Separation and Concentration of Particles in Fluid Using Ultrasonic Standing Wave
p.63
Measurement of Thermal Expansion Coefficients of Thin Film of Different Organic Coatings by Shearography
p.67
Development of Novel Optical Fiber AE Sensor with Multi-Sensing Function
p.71
Measurement for In-Plane Displacement of Tensile Plates with Through-Thickness Circular Hole and Partly Through-Thickness Circular Hole by Use of Speckle Interferometry
p.77
Test and Evaluation of a Newly Built Multi-Purpose Transmission Type Polariscope
p.81
The Detection and Imaging of Internal Defect Using ESPI-Based Strain Analysis
p.87

Measurement of Thermal Expansion Coefficients of Thin Film of Different Organic Coatings by Shearography

Article Preview

Abstract:

In the present work, thermal expansion coefficients of a number of organic coatings were studied by a non-destructive technique (NDT) known as shearography. An organic coating, i.e., epoxy, on a metallic alloy, i.e., carbon steels, was investigated at a temperature range simulating the severe weather temperatures in Kuwait especially between the daylight and the night time temperatures, 20-60 0C. The investigation focused on determining the in-plane displacement of the coating, which amounts to the thermal deformation (strain ) with respect to the applied temperature range. Along with the experimental data, a mathematical relationship was derived describing the thermal deformation of a coated film as a function of temperature. Furthermore, results of shearography indicate that the technique is very useful NDT method not only for determining the thermal expansion coefficients of different coatings, but also the technique can be used as a 2Dmicroscope for monitoring the deformation of the coatings in real-time at a submicroscopic scale.

You might also be interested in these eBooks
Advanced Nondestructive Evaluation I View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

67-70

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.67

Citation:

Cite this paper

Online since:

October 2006

Authors:

Khaled Habib

Keywords:

Carbon Steel, High-Temperature, In-Plane Displacement, Optical Interferometry, Organic Coating, Shearography, Thermal Expansion Coefficient

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] K. Robert, ERF, Speckle Metrology, Academic Press, New York (1978), P. 2.

Google Scholar

[2] H. Zhang and J. Ke, Determination of Residual Stress by Laser Speckle Shearing Interformetry and Hole Drilling Method, Journal of Experimental Mechanics (1986), Vol. 1, pp.181-188.

Google Scholar

[3] J. Shigley, Mechanical Engineering Design, McGraw-Hill 3rd Edition, New York (1978), pp.67-69.

Google Scholar

[4] Habib, k.,: Thermally induced deformations measured by shearography", Optics and Laser Technology. Vol. 37, pp.509-512 (2005).

DOI: 10.1016/j.optlastec.2004.06.007

Google Scholar