X-RAY DIFFRACTION INVESTIGATION OF MINOR PHASES OF 20 HIGH-TEMPERATURE ALLOYS

摘要

X-ray diffraction methods were used to identify the minor phases present in 20 high-temperature alloys in current use:16-25-6, 17W, 19-9EL, Discaloy 25, S590, N155, K-42-B, Refractaloy 26, Nimonic 80, Inconel W, Inconel Z, Inconel, Vitallium, 61, Stellite No. 6, 6059, 422-19, X-40, S816, and Hastelloy B.nThe seven minor phases found to exist in the various alloys were columbium carbide, columbium nitride, titanium carbide, titanium nitride, chromium carbide (Cr7C3), and carbides of the M23C6-and M6C-types in which the ratios of metal M to carbon atoms are, respectively, 23:6 and 6:1.