C3.14M/C3.14:2020-STANDARD METHOD FOR EVALUATION OF BRAZED JOINTS USING VISUAL AND METALLOGRAPHIC TECHNIQUES

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This standard describes and illustrates the test methods used to obtain information related to brazed joint quality and structural integrity. Verification methods include visual observation, as well as metallography of such parameters as braze wetting, braze joint erosion, brazing filler metal penetration, differences between excess wetting, lack of wetting and dewetting, and formation of voids, cracks, and features which may be detrimental to end use. Additionally, methods to determine diffusion of braze alloying elements and procedures to qualify such methods are described. Photographs illustrating visual inspection, schematic illustrations, and photomicrographs illustrating various aspects of brazed joint integrity are presented. ISBN Print: 978-1-64322-101-4 ISBN PDF: 978-1-64322-102-1