Rolling-element fatigue life of ausformed M-50 steel balls, Volume 4954
Richard Jay Parker, Erwin V. Zaretsky, Lewis Research Center, United States. National Aeronautics and Space Administration
National Aeronautics and Space Administration, 1968 - Technology & Engineering - 14 pages
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AISI M-50 balls AISI M-50 steel angle of 23 ausformed AISI M-50 ausformed balls ausforming 7/16-inch ausforming process provided BALLS By Richard balls on rolling-element balls were tested bearing balls confidence number consumable-electrode vacuum melted contact angle conventionally processed AISI conventionally processed balls conventionally processed CVM CONVENTIONALLY PROCESSED M-50 CVM AISI M-50 effect of ausforming end grain failure index fatigue lives five-ball fatigue tester grain flow group of ausformed groups of conventionally hardness heat added identical conditions Lewis Research Center lower ball set lubricant M-50 steel balls Martensite maximum Hertz stress metastable austenitic condition NASA five-ball fatigue number of stress outer race paraffinic mineral oil Parker and Erwin percent processed AISI M-50 processed CVM AISI processed M-50 balls reference groups reported in reference Rolling-Element Bearings rolling-element fatigue shown in figure specimens stress cycles stress of 800 Tests were conducted upper test ball vacuum melted CVM Zaretsky Lewis Research