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Effect of Surface Impulsive Thermal Loads on Fatigue Behavior of Constant Volume Propulsion Engine Combustor MaterialsThe development of advanced high performance constant-volume-combustion-cycle engines (CVCCE) requires robust design of the engine components that are capable of enduring harsh combustion environments under high frequency thermal and mechanical fatigue conditions. In this study, a simulated engine test rig has been established to evaluate thermal fatigue behavior of a candidate engine combustor material, Haynes 188, under superimposed CO2 laser surface impulsive thermal loads (30 to 100 Hz) in conjunction with the mechanical fatigue loads (10 Hz). The mechanical high cycle fatigue (HCF) testing of some laser pre-exposed specimens has also been conducted under a frequency of 100 Hz to determine the laser surface damage effect. The test results have indicated that material surface oxidation and creep-enhanced fatigue is an important mechanism for the surface crack initiation and propagation under the simulated CVCCE engine conditions.
Document ID
20040110825
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Zhu, Dongming (Army Research Lab. Cleveland, OH, United States)
Fox, Dennis S. (NASA Glenn Research Center Cleveland, OH, United States)
Miller, Robert A. (NASA Glenn Research Center Cleveland, OH, United States)
Ghosn, Louis J. (Ohio Aerospace Inst. Brook Park, OH, United States)
Kalluri, Sreeramesh (Ohio Aerospace Inst. Brook Park, OH, United States)
Date Acquired
August 21, 2013
Publication Date
August 1, 2004
Subject Category
Metals And Metallic Materials
Report/Patent Number
ARL-TR-3258
NASA/TM-2004-213084
E-14562
Meeting Information
Meeting: International Conference on Metallurgical Coatings and Thin Films
Location: San Diego, CA
Country: United States
Start Date: April 19, 2003
End Date: April 23, 2003
Sponsors: AVS Science and Technology Society
Funding Number(s)
PROJECT: DA Proj. 1L1-62211-A4-7A
WBS: WBS 22-708-03-04
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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