LOW TEMPERATURE FATIGUE CRACKS AS DELIBERATE FRACTURE ORIGINS.
Abstract
Specimens of 1/16 in. thick sheet of a high strength steel were provided with small surface cracks by fatigue stressing either at room temperature or at -22 F. The specimens were then tested in tension to evaluate the effective-apparent K sub Ic plane strain crack toughness values. The cracks formed at -200 F gave rather less consistent results and somewhat higher average apparent K sub Ic values at room temperature and at -100 F than did those formed at room temperature. It was also observed that the progress of fatigue cracking was more erratic at the lower temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 26, 1962
- Accession Number
- AD0282479
Entities
People
- J. E. Stawley
- T. C. Lupton
Organizations
- United States Naval Research Laboratory