Gamma titanium aluminides as prospective structural materials
暂无分享,去创建一个
Abstract This status report focuses on specific products of two γ-TiAl alloys that are advancing toward structural applications for 550–750°C service in advanced turbine engines. These are low-pressure turbine blade, transition-duct beam and radial diffuser castings for engine components, and corner-beam and closeout beam castings for the outlet-nozzle of a very large engine. Also included are current development of sheet corrugations for formed subcomponents and the perfection of cast turbine wheels for automotive turbochargers. In the current implementation stage, alloy composition, desired process and component definition are the important introductory issues. Then, the engineering technology that must be developed is discussed for the desired final product and a match of cost and benefit. Balancing better performance with the acceptance constraints is the key. Cost is a major constraint along with real and perceived risk. Within five to ten years, systematic reduction of certain hardware costs will occur as familiarity builds and enters into the production stage.
[1] Toshimitsu Tetsui,et al. Endurance and composition and microstructure effects on endurance of TiAl used in turbochargers , 1999 .
[2] David Cebon,et al. Materials Selection in Mechanical Design , 1992 .
[3] Young-Won Kim,et al. Gamma titanium aluminides , 1995 .
[4] Dennis M. Dimiduk,et al. Gamma titanium aluminide alloys : an assessment within the competition of aerospace structural materials , 1999 .