Materials Needs and R&D Strategy for Future Military Aerospace Propulsion Systems (2011) / Chapter Skim
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The period from about 1950 to 1990 in the United States produced significant advances in propulsion performance. That period was characterized by multiple military and commercial engine development programs, a robust group of engine companies and second-tier suppliers, and significant government investment in technology development, demonstration engines, and supporting infrastructure.
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The AFRL recognizes the need for activities in the near term, intermediate term, and far term to address the full spectrum of the Air Force mission; however, the expanded scope of the Air Force mission has put significant pressure on the far-term propulsion materials funding profile. The committee believes it is essential that a balance be maintained between the near-term, intermediate-term, and far-term activities in response to the FLTC
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Specifically, the United States has lost competitive advantage in the following areas: the attachment of the compressor and fan blades using advanced welding processes, superplastically formed diffusionbonded hollow fan blades, and some areas of ceramic-matrix composites. In most 1 Information on EuMaT is available at http://www.eumat.org/.
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In order to maintain or regain the U.S. competitive advantage in the areas of propulsion materials and keep the United States on the leading edge of propulsion technology, there is a need to increase activities in new materials development and competitive 6.2 component and 6.3 demonstrator programs related to materials development and to pursue collaborative research activities within this very com petitive global environment.
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military needs or to keep the United States on the leading edge of propulsion technology. The United States has had a demonstrated process for developing state-ofthe-art materials for propulsion systems, but that process needs to be updated to accommodate today's development environment.
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Because the United States trails Japan and Europe in some key propulsion materials areas, it is important that laws and practices allow the inclusion of these leading-edge areas of materials development in new government and industry consortia. DOD fund ing agencies should identify and support, both financially and through regulatory and administrative relief, opportunities for pre-competitive collaborative research for structural propulsion materials, both domestically and with global partners.
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• To maintain or regain the U.S. military competitive advantage in the areas of propulsion materials and to keep the United States on the leading edge of propulsion technology, there is a need for advocacy within the Office of the Secretary of Defense/Director, Defense Research and Engineering, to increase activities in new materials development and competitive 6.2 component and 6.3 demonstrator programs.
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• The United States should continue to develop computational methods to shorten materials development time and to reduce the time required for testing and materials validation so as to reduce the risk related to insertion of new materials. • The Air Force should fully implement the R&D strategy that it develops, and it should reevaluate its strategy annually.
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