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Three inch diameter billets of TZM plus 1.5% Cb Molybdenum, alloy tungsten alloys, superalloys (B-1900, 713-C, U-700 and Rene 41), Inconel X were extruded on an instrumented 700 Ton Experimental Extrusion Press to establish a relationship among extrusion pressures, billet material properties, and processing parameters. The following relationship was established: P equals AY plus bY 1n R plus S (cot alpha) 1n R plus 4 k L/D where P is total extrusion pressure, a and b are constants for each die angle, Y is material flow strength at temperature and strain rate of processing, R is reduction ratio, alpha is extrusion die half angle, L is billet length in container, D is container diameter, and S and k are interface shear strength in die and liner respectively. (Author).
Technical reports published by the Air Force Materials Laboratory during the period 1 January 1967-31 December 1967 are abstracted herein and indexed by branches of the laboratory, technical subject matter, investigator, project monitor and contractor. Reports on research conducted by the Air Force Materials Laboratory personnel as well as that conducted on contract are included.
As part of the Metalworking Process and Equipment Program, a survey was conducted to collect and summarize information on deformation characteristics of metals and their effect on processing operations. This report presents information obtained from reports on Governmentsponsored work and from articles in technical publications. The report covers eight subjects: extrusion, forging, rolling, thermal mechanical variables affecting the properties of refractory metals and alloys, development of preferred orientations, anisotropy of strength and ductility, high-strain-rate deformation, and strain aging. In order to be useful to engineering students and production engineers the topics are treated in two ways. Generalized discussions of common processes point out why specific variables must be modified in order to deform certain types of metals satisfactorily. When practical, data on the more-difficultto-form metals are used to illustrate the principles, limitations, and effects of the processes. The objective is to help the non-specialist recognize the implications of specific findings and to apply them to specific operations. (Author).