Materials Analysis of a Fatigue Testing Mandrel
ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS
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A materials characterization and failure analysis was performed on a fatigue testing mandrel that ailed abruptly in service after a total of only 5061 cycles. The mandrel was reportedly composed of marage 250 grade steel, and the raw material was specified to be delivered in the solution-annealed condition. Subsequent processing was to include rough machining to the approximate mandrel dimensions, an aging treatment at 900 deg F for four hours, and finish machining.
- Physical Chemistry
- Metallurgy and Metallography
- Machinery and Tools
- Test Facilities, Equipment and Methods