|About this Abstract
||Materials Science & Technology 2011
||Fatigue and Microstructure: A Symposium on Recent Advances
||The Fatigue Behavior of High Strength Tool Steel Materials
||Amit Shyam, Peter Blau, Tyson Jordon, Nan Yang
|On-Site Speaker (Planned)
High strength tool steel materials are candidate alloys for diesel fuel injection applications. Results from an experimental investigation of the fatigue behavior of high strength tool steel materials will be reported. The smooth specimen fatigue behavior as well as the initiation and propagation behavior of cracks emanating from simulated spray holes in test coupons was determined. Fractographic examination revealed that the failed smooth specimens demonstrated clear separation between surface initiation at higher applied stresses and sub-surface or fisheye type failure from subsurface inclusions at lower stresses. A procedure was developed for the determination of small crack propagation threshold for this material. The application of damage tolerant design philosophy on the next generation diesel fuel injectors will be discussed.
Research sponsored by the Propulsion Materials Program, US DOE Office of Vehicle Technologies, under contract DE-AC05-00OR22725 with UT-Battelle, LLC.
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