Materials Processing Research and Development
Abstract
Research during the contract dealt with several areas related to the processing of advanced aerospace materials: fracture and cavitation, microstructure evolution, texture evolution, and constitutive equations. Materials studied were alpha 2, gamma, and near gamma TiAl's, an orthorhombic TiAl alloy, Ti-6Al-4V, 2024 Al, a nanophase Al alloy, and a tungsten heavy alloy. Tensile and uniaxial compression tests were used, as was the ring test for interface friction and heat transfer tests. In addition to conventional processes, emerging processes such as ECAE and friction stir welding were used and modeled. Finite element modeling was employed to predict states of stress, strain, strain rate, and temperature as well as material flow and loads. New models were developed for crack and cavitation prediction. Microstructure evolution was modeled using analytical methods, and a CA model was developed for heterogeneous static and dynamic recrystallization. AFRL resources were united with private industry, DoD contractors, and other Federal facilities using CTeC, MAl, and various CRADA tasks involving 13 DoD and DOE contractors. MPL technicians conducted 3072 processing operations and tests, and designed, fabricated or installed the following tooling or equipment; salt pot, ECAE tooling, rapid heat treat stand, 1OOO-ton load cell, DS unit, 55 kip and 200 kip MTS tooling, spin mold casting device, and mothballed the isothermal chamber.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 2001
- Accession Number
- ADA412695
Entities
People
- Douglas R. Barker
- Robert L. Goetz
Organizations
- Universal Energy Systems