Rolling Contact Fatigue - Component Design and Testing for P/M Applications

Newly developed sintered steels, combined with new densification processes, make the P/M process a candidate for highly loaded gears or similar components. There is a great need to develop methods which support design engineers with well established and standardized data. Furthermore, the challenge of the global market requires comparable material data and international standards. The absence of this data forces the engineer to use higher safety factors, risk poor reliability, or perform costly tests. The paper describes principle differences in the behavior of porous and non-porous materials under rolling contact conditions. The methods for determining RCF will be critically reviewed in regard to the special needs of P/M materials. Test results on P/M and wrought materials will be discussed. The paper introduces the ZF-RCF test bench, developed by ZF-Friedrichshafen (Germany) and the Gear Research Institute in Munich (Germany). The test principle used fulfills requirements for testing porous materials by offering the following features: Test results obtained with the ZF-RCF test bench have been proven for ranking materials according their pitting behavior. For the first time, variable loading tests give engineers the opportunity to design gears according to the actual loading conditions. Possible applications of this work include high density camshaft lobes, planetary gears, and even sun gears.

• Record URL:
  • https://doi.org/10.4271/1999-01-0332
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Abstract reprinted with permission of SAE International.
• Authors:
  • Hoffmann, Gottfried
  • Sonsino, Cetin M
  • Michaelis, Klaus
• Conference:
  • International Congress & Exposition
  • Location: Detroit Michigan, United States
  • Date: 1998-2-23 to 1998-2-26
• Publication Date: 1998-1-23

Language

• English

Media Info

• Media Type: Web
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Camshafts; Gears; Lubricants
• Subject Areas: Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 01794472
• Record Type: Publication
• Source Agency: SAE International
• Report/Paper Numbers: 1999-01-0332
• Files: TRIS, SAE
• Created Date: Dec 9 2021 10:17AM