Date Available
4-12-2011
Year of Publication
2010
Degree Name
Master of Science in Mechanical Engineering (MSME)
Document Type
Thesis
College
Engineering
Department
Mechanical Engineering
First Advisor
Dr. Kozo Saito
Abstract
Defects in Aluminum, Stainless steel and galvanized steel sheets are studied in reflection mode infrared thermography. The effect of material properties, surface finish, heating intensity, heater emission spectra, pixel size and defect size are studied. Contrast is governed by heat quality, emissivity and defect geometry—which follows a logarithmic trend. The diameter detected via infrared thermography is found to be at least 30% larger than the measured diameter and sub-pixel defects can be detected. The use of gradient and Laplacian of temperature is introduced as a means of increasing defect contrast and mitigating heater variation.
Recommended Citation
Harik, Marc Anthony, "CHARACTERIZATION OF DEFECTS IN METAL SHEETS VIA INFRARED THERMOGRAPHY" (2010). University of Kentucky Master's Theses. 32.
https://uknowledge.uky.edu/gradschool_theses/32
