Effects of Isothermal Forging Conditions on the Properties and Microstructures of Ti-10V-2Fe-3Al.
Abstract
The effects of isothermal forging conditions on the properties and microstructures of Ti-10V-2Fe-3Al were investigated. Ring specimens with two different grain sizes were forged isothermally on a hydraulic press at two different speeds (0.03 and 3.0 ipm). The ring specimens with the smaller grains (8 microns) were forged at three temperatures 1250 F(677 C), 1350 F(732 C) and 1450 F(788 C); the rings with the larger grains (255 microns) were forged at eight temperatures in the range 1190 F(643 C) to 1750 F(954 C). After forging, the rings were quenched in water to retain the as-forged structure. The resulting microstructures were determined. The room temperature mechanical properties resulting from forging at selected conditions were also determined. The flow stress and the resulting microstructures and mechanical properties depend on the forging conditions used, which can be characterized by the value of the flow stress. It is proposed that if the flow stress (forging conditions) is known, the room temperature mechanical properties (tensile, fracture toughness, W/A) may be closely estimated. Furthermore, a long-term relation is shown to exist between room temperature Rockwell C hardness and flow stress and room temperature properties, which could be used for a rough estimate of the properties of the as-forged material.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA066062
Entities
People
- Ivan Antonio Martorell
Organizations
- Air Force Research Laboratory