APPLIED RESEARCH TO ESTABLISH INFRARED DETECTION METHODS FOR NONDESTRUCTIVE ANALYSIS OF METALLIC AND CERAMIC STRUCTURES, PART II.
Rept for Jan 62-Feb 63,
AUTOMATION INDUSTRIES INC BOULDER COLO
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Further study was undertaken of the feasibility of thermal nondestructive evaluation of materials see also AD-299 230. Emphasis was on metals. A thermal testing system developed previously on the program was utilized to study material properties through the inspection of heat transfer rates. Heat introduced into the material establishes a heat transfer rate which is monitored by infrared radiometric surface temperature measurements. These temperature measurements are used to indicate certain material properties which have an effect on heat transfer. Properties detected to date are voids, inclusions, unbonding, porosity, coating thickness, alloy percentage, grain size, and lattice deformation by cold working. Theoretical studies indicated that several other properties are amenable to thermal evaluation, including phase formation, order-disorder, pre-precipitation and hardening, and corrosion. Author