Mechanical Threshold Stress Constitutive Strength Model Description of HY-100 Steel
Abstract
The mechanical threshold stress (MTS) approach is employed to characterize the constitutive stress-strain response of HY-100 steel. A generalized, three-term MTS strength model currently considers athermal, thermal, and strain-hardening contributions to flow stress. Aspects of the MTS framework pertinent to Navy HY steels are discussed, and a calibration methodology is presented for determining MTS strength model parameters. In addition, a linear strain-hardening modification to the existing structure evolution expression (flow stress saturation) is proposed to better describe the large-strain, strain-hardening behavior. Polycrystalline plasticity calculations suggest the linear-like hardening behavior is a consequence of deformation-path-dependent texture evolution. Calculation results are applied to MTS model stress-strain predictions and, in part, help explain the differences between compression and torsion test data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 16, 1999
- Accession Number
- ADA372816
Entities
People
- D. M. Goto
- George T. Gray III
- J. Bingert
- R. K. Garrett Jr.
- Shuh-rong Chen
Organizations
- Naval Surface Warfare Center Indian Head Division