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기술보고서

기술보고서 게시판 내용
타이틀	Simulated Single Tooth Bending of High Temperature Alloys
저자	Handschuh, Robert, F.;; Burke, Christopher
Keyword	BENDING FATIGUE;; GAS TURBINE ENGINES;; GEARS;; HEAT RESISTANT ALLOYS;; LOW SPEED;; MISSION PLANNING;; SPACE MISSIONS
URL	http://hdl.handle.net/2060/20130000795
보고서번호	NASA/TM-2012-217805
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Future unmanned space missions will require mechanisms to operate at extreme conditions in order to be successful. In some of these mechanisms, very high gear reductions will be needed to permit very small motors to drive other components at low rotational speed with high output torque. Therefore gearing components are required that can meet the mission requirements. In mechanisms such as this, bending fatigue strength capacity of the gears is very important. The bending fatigue capacity of a high temperature, nickel-based alloy, typically used for turbine disks in gas turbine engines and two tool steel materials with high vanadium content, were compared to that of a typical aerospace alloy-AISI 9310. Test specimens were fabricated by electro-discharge machining without post machining processing. Tests were run at 24 and at 490 C. As test temperature increased from 24 to 490 C the bending fatigue strength was reduced by a factor of five.