Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1985-04-26
1986-06-10
Lechert, Jr., Stephen J.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75123B, 75123R, 75123D, 75123L, 75124, 75123M, 420424, 420425, 420426, 420427, 420428, 420429, 420431, 420435, 420437, 420439, 420440, 420441, 420445, 420446, 420451, 419 39, 419 41, 419 48, 419 53, C22C 2900
Patent
active
045941041
ABSTRACT:
The present invention provides a method for producing a consolidated article composed of a transition metal alloy. The method includes the step of selecting a rapidly solidified alloy which is at least about 50% glassy. The alloy is formed into a plurality of alloy bodies, and these alloy bodies are compacted at a pressing temperature of not more than about 0.6 Ts (solidus temperature in .degree.C.) to consolidate and bond the alloy bodies together into a glassy metal compact having a density of at least about 90% T.D. (theoretical density). The compacted glassy alloy bodies are then heat treated at a temperature generally ranging from about 0.55-0.85 Ts, but, in any case, above the alloy crystallization temperature, for a time sufficient to produce a fine grain crystalline alloy structure in the compacted article.
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M. von Heimendal et al., "The Activation Energies of Crystallization in the Amorphous Alloy METGLAS 2826 A", J. of Mat. Sci., 16, 1981, pp. 2405-2410.
R. S. Tiwari et al., "The Effect of Tensile Stress on the Crystallization Kinetics of Metglas 2826 Fe.sub.40 Ni.sub.40 P.sub.14 B.sub.6 ", Materials Science and Engineering, 55 (1982) pp. 1-7.
H. Liebermann, "Warm Consolidation and Cladding of Glassy Alloy Ribbons", Mat. Sci. Eng., 46 (1980) pp. 241-248.
Allied Corporation
Fuchs Gerhard H,.
Lechert Jr. Stephen J.
Riesenfeld James
Yee Paul Y.
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