Effect of Neutron Irradiation on Fatigue Crack Propagation in Type 316 Stainless Steel at 649C.
Abstract
The effect of fast neutron irradiation on the fatigue crack propagation performance of Type 316 stainless steel was investigated at 649C and compared with previous results at 593C. The results show that, during continuous cycling, no significant effect of irradiation on crack propagation rate was observed in annealed steel. The inclusion of a one minute hold time increased the crack propagation rates in the irradiated annealed steel when compared with the results at 593C. Irradiation was found to increase the crack propagation rates in 20 percent cold worked steel during both continuous cycling and one minute hold time tests. Scanning electron microscopy (SEM) examination of the fracture surfaces of the unirradiated fatigue specimens revealed that intergranular carbide precipitation during testing at 649C acted to delay the transition to a purely intergranular failure mode with hold time as previously observed at 593C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 14, 1979
- Accession Number
- ADA069085
Entities
People
- D. J. Michel
- H. H. Smith
Organizations
- United States Naval Research Laboratory