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Comparisons of modified Vasco X-2 and AISI 9310 gear steelsEndurance tests were conducted with four groups of spur gears manufactured from three heats of consumable electrode vacuum melted (CVM) modified Vasco X-2. Endurance tests were also conducted with gears manufactured from CVM AISI 9310. Bench type rolling element fatigue tests were conducted with both materials. Hardness measurements were made to 811 K. There was no statistically significant life difference between the two materials. Life differences between the different heats of modified Vasco X-2 can be attributed to heat treat variation and resultant hardness. Carburization of gear flanks only can eliminate tooth fracture as a primary failure mode for modified Vasco X-2. However, a tooth surface fatigue spall can act as a nucleus of a tooth fracture failure for the modified Vasco X-2.
Document ID
19810005810
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Townsend, D. P. (NASA Lewis Research Center Cleveland, OH, United States)
Zaretsky, E. V. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
November 1, 1980
Subject Category
Mechanical Engineering
Report/Patent Number
NASA-TP-1731
E-070
Accession Number
81N14322
Funding Number(s)
PROJECT: RTOP 506-16
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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