Room Temperature Rate Sensitivity, Creep, and Relaxation of Type 304 Stainless Steel.
Abstract
The results show significant rate sensitivity, creep, and relaxation. Test histories involving loading and unloading with positive loads up to 15% strain show that the relaxation behavior in the plastic range depends only on the strain rate preceding the relaxation test and is independent of the strain magnitude. Also, the relaxation behavior is uniquely related to the stress changes corresponding to instantaneous large changes in the strain rate during tensile tests. Completely reversed strain controlled loading gradually changes the stress-change strain-rate-change behavior. Annealed specimens and specimens loaded to a cyclic steady state differ not only in their work hardening characteristic but also in their rate-dependent behavior. In the cyclic steady state different hysteresis loops are traced for different strain rates with fully reversible transitions from one hysteresis loop to the other under strain-rate changes. These results support the notion that viscoplasticity can be represented by piecewise nonlinear viscoelasticity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1978
- Accession Number
- ADA060150
Entities
People
- Erhard Krempl
Organizations
- Rensselaer Polytechnic Institute