Metallurgical and Materials Transactions A

, Volume 31, Issue 8, pp 1985–1996

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

  • D. M. Goto
  • R. K. GarrettJr.
  • J. F. Bingert
  • S. R. Chen
  • G. T. GrayIII
Article

Abstract

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.

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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2000

Authors and Affiliations

  • D. M. Goto
    • 1
  • R. K. GarrettJr.
    • 1
  • J. F. Bingert
    • 2
  • S. R. Chen
    • 2
  • G. T. GrayIII
    • 2
  1. 1.the Naval Surface Warfare CenterIndian Head DivisionIndian Head
  2. 2.the Los Alamos National LaboratoryLos Alamos

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