THE EFFECT OF AUSFORMING ON ROLLING CONTACT FATIGUE.
Abstract
A development program was conducted on M-50 and VascoJet MA to determine the improvements possible in bearing steels by the incorporation of a hotcold working (ausforming) treatment in their processing. Primary emphasis was on the improvements possible in rolling contact fatigue. In support of this, heat treat, corrosion, hardness and microstructural studies were performed. The ausforming process as applied to the rolling contact fatigue life of M-50 bearing steel will substantially improve life (exceeding 800%). This will be a significant factor in meeting the long life bearing requirements for advanced air breathing propulsion systems. A metallurgical analysis was conducted and a mechanism is proposed which is thought to be the primary factor in providing the significant improvements in rolling contact fatigue life. Evidence is presented which indicates that the life improvement is primarily due to more uniform carbide dispersion, reduction of massive carbide particles, and reduction in martensite platelet size. These microstructural changes are believed to be associated with strain induced precipitation and its interplay with strain hardening during the deformation cycle. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1963
- Accession Number
- AD0454262
Entities
People
- E. N. Bamberger
Organizations
- General Electric