FATIGUE OF METAL CRYSTALS--PART II. EXTENSION OF FATIGUE LIFE OF CRYSTALS THROUGH CONTROL OF SUBSTRUCTURE.
Abstract
The intrinsic fatigue life of aluminum single crystals was extended by alternating the cycling between high and low strain amplitudes. It was shown that the life could be extended 50%-75% by the application of a multi-stage cycling program which prevented an excessive build-up of lattice defects induced by high-strain cycling. The fatigue life of aluminum crystals with transverse boundaries was also extended by annealing the high-strained regions during fatigue. The interconnection between surface topography and slip activity in single crystals and polycrystalline specimens of silver was investigated. A correlation between the surface striations and the activity on the primary glide plane was established. Cross-slip did not appear to contribute greatly to the striation formation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1967
- Accession Number
- AD0819194
Entities
People
- B. K. Park
- E. Levine
- S. Weissmann
- V. Greenhut
Organizations
- Rutgers University–New Brunswick