Mechanics of brittle fracture by G. P. Cherepancy

By G. P. Cherepancy

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Dislocations interact­ ing with the precipitates during creep testing are shown in Fig. 25. This alloy is comparable to some nickel-base superalloys at 1025 ac. 2. IRON-BASE ALLOYS With the successful development of high strength nickel-base superalloys (and to some extent cobalt-base superalloys) over the last 30 years, there has been little recent interest in developing iron-base alloys for the higher temperature gas turbine engine components.

1 890). Process of Melting, Refining and Casting of Metals. United States Patent 428,522. 5. Dedication speech at "Superalloy 1980- Proceedings of the Fourth International Sympo­ sium on Superalloys," September 2 1 -25, 1980. 1. Introduction�Supera/loys 7 6. Boesch, W. J. (1 957). The Influence of Impurities and the Allotropic Transformation on the Mechanical Properties of Cobalt. Metals Research Laboratories-Union Carbide Corpora­ tion Internal Report JN-5302R, May 16, 1957. 7. Von Werner, K.

ISBN 0-12-690845-1 JOSEPH R. STEPHENS 10 constituents, must be maintained to achieve desired properties. , cobalt in the 1950's, chromium in the 1 970's, and cobalt and other elements in the late 1970's and early 1980's, NASA Lewis Research Center undertook a program to address this continuing problem. S. resources and reserves, discuss the supply sources and availability of strategic materials, and finally concentrate on the results achieved from the research program undertaken by NASA Lewis Research Center named Conservation Of Strategic Aerospace Materials (COSAM) [1,2].

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