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  USA  48090
  • Authors:
    • Thevenow, V H
  • Publication Date: 1976-3-22

Media Info

  • Pagination: 37 p.

Subject/Index Terms

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