Details

Autor(en) / Beteiligte

• GOTO, D. M
• BINGERT, J. F
• CHEN, S. R
• GRAY, G. T
• GARRETT, R. K

Titel

The mechanical threshold stress constitutive-strength model description of HY-100 steel

Ist Teil von

• Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2000-08, Vol.31 (8), p.1985-1996

Ort / Verlag

New York, NY: Springer

Erscheinungsjahr

2000

Quelle

SpringerLink

Beschreibungen/Notizen

• A generalized three-term mechanical threshold stress (MTS) strength model description, considering athermal, thermal, and strain-hardening contributions to flow stress, is employed to characterize the constitutive stress-strain response of HY-100 steel. Aspects of the MTS framework pertinent to United States 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 that 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.