Effect of a Prestrain-Surface Layer Elimination Process on Low Cycle Fatigue Life.
Abstract
Low cycle fatigue specimens of Ti 6Al-4V and a martensitic stainless steel H46, were tested to determine the effect of a prestraining-surface layer elimination process on the low cycle fatigue life. Results of axial strain controlled tests conducted at ambient temperature, using a constant strain range after prestraining for specimens with and without a surface layer elimination process, showed no significant improvements over those of baseline tests for Ti 6Al-4V. However, H46 material did show an improvement as a result of a surface layer elimination process. The improvement was approximately 15% for both crack initiation and failure. The increase in life was attributed to an increase in the proportional limit which in turn decreased the amount of plastic strain. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 22, 1976
- Accession Number
- ADA028780
Entities
People
- Victor H. Thevenow
Organizations
- General Motors