Journal
MATERIALS CHARACTERIZATION
Volume 56, Issue 1, Pages 10-18Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2005.08.004
Keywords
strain fields; image correlation; scanning electron microscope
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The purpose of this paper is to present a method based on the correlation of digital images obtained on a microscopic scale. A specific grainy pattern has been developed. The use of the scanning electron microscopy (SEM) allowed the determination of full-field 2D displacements on an object surface with a spatial resolution of about I mu m. Validation tests were performed in order to quantify performances and limits of this method. An example of its application is presented for a Ti-6Al-4V titanium alloy. Results show that it is possible to obtain in-plane displacement values on the object surface with efficient spatial resolution and accuracy. Thus, such a technique can be used to highlight on a relevant scale the role of the microstructure in material deformation processes. (c) 2005 Elsevier Inc. All rights reserved.
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