Rolling-element fatigue life of AMS 5900 balls
Richard Jay Parker, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Lewis Research Center
National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1983 - Technology & Engineering - 10 pages
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10-percent fatigue 1983 ROLLING-ELEMENT FATIGUE 5900 then designated air cool 797 aircraft bearing AISI M-50 balls AMS 5749 balls AMS 5900 balls balls at visible balls tested Bearing materials Chemical composition,a wt cold headed balls cold heading procedure confidence number contact angle corrosion crossed by running fatigue failure fatigue life results five-ball fatigue tester Five-ball test HARDNESS AND RETAINED headed AMS 5900 heading had small identical conditions Lewis Research Center lot A AMS lot A balls lower balls lubricant maximum Hertz stress million stress cycles naphthenic mineral oil NASA number of upper-ball percent Performing Organization powder-processed VIM-VAR AMS raceway retained austenite Rolling-element bearings rolling-element fatigue tests running tracks salt shaft speed spall originating superrefined naphthenic mineral test assembly TEST MATERIALS Material test series upper ball upper test ball upper-ball stress cycles vacuum arc remelt VIM-VAR AISI M-50 VIM-VAR processed visible surface cracks warm headed AMS warm headed balls