Effects of Hot Forging Variables Upon Microstructure and Properties of Metals and Alloys.
Final technical rept. 1 Jan 76-31 Dec 78,
BATTELLE COLUMBUS LABS OHIO
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This research program focused on hot forging of nickel. Nickel-base alloys, their development, and fabrication are important to the Air Force in its efforts to increase the operating temperatures, decrease weight in aircraft, and to minimize waste during processing to the final products. Hot forging is an important step in the forming of engine discs, blades and vanes of superalloys or titanium alloys, and also in forming non-engine components such as aluminum or titanium alloy structural airframe parts. Accordingly, a basic understanding of the hot forging process is important for improving its efficiency and usefulness. This kind of research can best be accomplished through an approach incorporating a cooperative interaction between materials scientists engaged in high temperature deformation and fracture, and mechanicists experienced in analyzing metal flow during complex processing operations. This grant combined both approaches in an interactive manner to selected metals alloys. The goal was to further the fundamental understanding of the mechanisms of hot working including flow and fracture, to analyze in detail the hot forging process for several simple shapes, and to tie these areas together in an analysis of the relation between the hot forging parameters and the material response in terms of microstructure, cracking, working loads, and temperatures.
- Properties of Metals and Alloys
- Fabrication Metallurgy