COMPARISON OF THE FRENCH DAMAGE LINE TO CYCLIC INDUCED CHANGES IN THE YIELD BEHAVIOR OF LOW CARBON STEEL,
Abstract
The upper yield point of low carbon steel can be completely removed by cyclic stressing above the fatigue limit under fully-reversed conditions. This removal is dependent upon both the magnitude of the cyclic stress and the number of applied cycles. The locus of points, superimposed on an S-1ogN diagram, representing this yield point removal, appears similar to the French damage line. The objective of this research was to investigate this similarity. The results verify the macroscopic similarity, but suggested mechanisms which control the phenomena are quite different. The French damage line is dependent primarily upon localized microcrack initiation and propagation, and the cyclic yield point behavior is dependent upon gross cumulative multiplication of mobile dislocations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1969
- Accession Number
- AD0697646
Entities
People
- D. V. Assadi
- R. I. Stephens
Organizations
- University of Iowa