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Surface fatigue life and failure characteristics of ex-53, cbs 1000m, and aisi 9310 gear materials
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Townsend, D. P. |
| Copyright Year | 1985 |
| Description | Spur gear endurance tests and rolling-element surface fatigue tests are conducted to investigate EX-53 and CBS 1000M steels for use as advanced application gear materials, to determine their endurance characteristics, and to compare the results with the standard AISI 9310 gear material. The gear pitch diameter is 8.89 cm (3.50 in). Gear test conditions are an oil inlet temperature of 320 K (116 F), an oil outlet temperature of 350 K (170 F), a maximum Hertz stress of 1.71 GPa (248 ksi), and a speed of 10,000 rpm. Bench-type rolling-element fatigue tests are conducted at ambient temperature with a bar specimen speed of 12,500 rpm and a maximum Hertz stress of 4.83 GPa (700 ksi). The EX-53 test gears have a surface fatigue life of twice that of the AISI 9310 spur gears. The CBS 1000M test gears have a surface fatigue life of more than twice that of the AISI 9310 spur gears. However, the CBS 1000M gears experience a 30-percent tooth fracture failure which limits its use as a gear material. The rolling-contact fatigue lines of RC bar specimens of EX-53 and ASISI 9310 are approximately equal. However, the CBS 1000M RC specimens have a surface fatigue life of about 50 percent that of the AISI 9310. |
| File Size | 879941 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860003141 |
| Archival Resource Key | ark:/13960/t0sr3rm57 |
| Language | English |
| Publisher Date | 1985-10-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Fatigue Life Mechanical Properties Mechanical Drives Fatigue Tests Gears Gear Teeth Rolling Contact Loads Surface Reactions Ambient Temperature Failure Analysis Structural Design Criteria Steels Fracturing Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
