EFFECT OF A PRESTRAIN-SURFACE LAYER ELIMINATION PROCESS ON LOW CYCLE FATIGUE LIFE

Low cycle fatigue specimens of Ti 6A1-4V 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 6A1-4V. However, H46 material did show an improvement as a result of a surface layer elimination process. The improvement was approximately 15% of 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)

• Corporate Authors:

  General Motors Corporation

  Warren, MI  United States  48090
• Authors:
  • Thevenow, V H
• Publication Date: 1976-3-22

Media Info

• Pagination: 37 p.

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Pavement layers; Surface course (Pavements)
• Uncontrolled Terms: Crack initiation
• Old TRIS Terms: Low cycle fatigue; Surface layer elimination
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00144363
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EDR-8755 Final Rpt.
• Contract Numbers: N00019-75-C-0279
• Files: TRIS
• Created Date: Jan 16 1977 12:00AM