THE ROLLING LOAD CARRYING CAPACITY OF SINTERCAST CERMETS
Abstract
Cermet rollers composed of about 67 vol-% TiC infiltrated with Inconel 700 (Ni-Cr alloy) or Haynes Stellite 31 (Co-Cr-W alloy) were rotated together under load, and the number of cycles to failure was recorded. The load carrying capacity at room temperature (with ample lubrication) of the cermet rollers at 10 to the 7th power cycles was about 150 lb or about 12% loadwise, and 75% stresswise, that of SAE 52100 steel. Failure of the rollers occurred by (1) fatigue spalling similar to that of homogeneous metallic structures, (2) abrasion and pitting, and (3) collapse of material subsurface to the track, resulting in a nonuniformly curved surface. An excessive amount of microporosity was present in both cermets, and areas of macroporosity were apparent in the specimen of TiC- Haynes Stellite. Studies were continued at 500, 700, and 1000 F. AD-25906 3N6 AD-259 061Div. 16, 12, 1U (6 July 61) National Aeronautics and Space Administration, Washington, D. C. PROCEEDINGS OF A CONFERENCE ON RESULTS OF THE FIRST U. S. MANNED SUBORBITAL SPACE FLIGHT, JUNE 6, 1961, WASHINGTON, D. C. 1961, 76p. incl. illus. tables, 15 refs. (In cooperation with National Institutes of Health and National Academy of Sciences) Unclassified report Available from Government Printing Office, Wash. 25, D. C. DESCRIPTORS: *Space flight, Manned, Space environmental conditions, Determination, Space capsules, Pressure suits, Medical examination, *Space medicine, Medical equipment, Instrumentation, Stress (Physiology), Recording devices, Weight lessness, Sensory perception, Pilots, Training, Training devices, *Conferences. Open-ended Terms: MR-3, Mercury project, Mercury Redstone.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 02, 1959
- Accession Number
- AD0259062
Entities
People
- R.l. Mohan