By B. A. Wilcox (auth.), I. Machlin, R. T. Begley, E. D. Weisert (eds.)
This book files complaints of the Symposium on steel lurgy and know-how of Refractory steel Alloys, held in Washington, D.C. on the Washington Hilton lodge on April 25-26, 1968, below sponsorship of the Refractory Metals Committee, Institute of Metals department, of the Metallurgical Society of AIME, and the nationwide Aeronautics and house management. The Symposium awarded serious experiences of chosen themes in refractory steel alloys, thereby contributing to an in-depth figuring out of the cutting-edge, and setting up a final analysis for extra study, improvement, and alertness. This Symposium is 5th in a chain of meetings on refractory metals, subsidized through the Metallurgical Society of AlME. guides issuing from the meetings are helpful technical and ancient resource books, tracing the evolution of refractory metals from early laboratory alloying experiences to their current prestige as necessary engineering fabrics. Refractory metals are arbitrarily outlined via melting aspect. a zero melting temperature of over 3500 F was once chosen because the minimal for this Symposium, therefore except for chromium and vanadium, which logically might be handled with different refractory metals in teams VA and through of the periodic desk. The Refractory Metals Committee is making plans reports of chromium and vanadium in next conferences.
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Additional info for Refractory Metal Alloys Metallurgy and Technology: Proceedings of a Symposium on Metallurgy and Technology of Refractory Metals held in Washington, D.C., April 25–26, 1968. Sponsored by the Refractory Metals Committee, Institute of Metals Division, The Me
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T. Begley, J. L. Godshall, and D. L. Harrod, "Development of Dispersion Hardened Creep Resistant Columbium Alloys", paper presented at the Fourth Symposium on Refractory Metals, French Lick, Indiana, October 3-5, 1965 (to be published by Gordon and Breach). (16) W. H. Chang, "Effect of Carbide Dispersion in Tantalum-Base Alloys", ibid. (17) p. L. Raffo and W. D. Klopp, "Solid Solution and Carbide Strengthened Arc Melted Tungsten Alloys", ibid. (18) B. A. Wilcox and A. , (19) M. F. Ashby, "A Theory of the Critical Shear Stress and Work Hardening in Dispersion-Hardened Crystals", paper presented at the Oxide Dispersion Strengthening Conference, Bolton Landing, New York, June 27-29, 1966 (to be published by Gordon and Breach).
Fig. 21. Microstructure of unidirectiona11y solidified Ta-Ta2C eutectic (a) Transverse section, 200 X, (b) Longitudinal section, 200 X (courtesy of M. J . Sa1kind)_ B. A. J::. ~40 ~--------~ c ~ ~ 1~~--~L---~1~200~--~L---~1~400~--~L----1~600~--~~==~1~800 Temperoture,OC Fig. 22. A comparison of the high temperature ultimate strength of a eutectic Ta + Ta2C composite with those of unalloyed Ta and a strong Ta-base alloy. 33 BASIC STRENGTHENING MECHANISMS Two composite systems, where the matrix was a refractory metal, have been studied by Lemkey, et al.
M. , (54) J. D. Embury, A. S. Keh, and R. M. Fisher, Trans. AIME, 236, 1252 (1966). (55) V. K. Chandhok, A. Kasak, and J. p. Hirth, Trans. ASM, 59, 288 (1966). (56) E. S. Meieran and D. A. Thomas, Trans. AIME, 1]1, 937 (1965). (57) E. Nachtiga11, P1ansee Proceedings-Sintered High Temperature and Corrosion Resistance Materials, F. , Pergamon Press, London, 1956, p. 313 (58) B. C. Allen, D. J. Maykuth, and R. I. Jaffee, J. Inst. , 90, 120 (1961-62). (59) M. Semchyshen and R. Q. Barr, ASTM Spec. Tech.
