A Novel Description of Thermomechanical Behavior Using a Rheological Model

Isothermal cyclic stress-strain deformation and thermomechanical deformation (TMD) of 429EM stainless steel were analyzed using a rheological model employing a bi-linear model. The proposed model was composed of three parameters: elastic modulus, yield stress and flow stress. Monotonic stress-strain curves at various temperatures were used to construct the model. The yield stress in the model was nearly same as 0.2% offset yield stress. Hardening relation factor, m, was proposed to relate cyclic hardening to kinematic hardening. Isothermal cyclic stress-strain deformation could be described well by the proposed model. The model was extended to describe TMD. The results revealed that the bi-linear thermomechanical model overestimates the experimental data under both in-phase and out-of-phase conditions in the temperature range of 350-500°C and it was due to the enhanced dynamic recovery effect.
Publisher
Trans Tech Publications
Issue Date
2006-06
Keywords

A theological model; Cyclic hardening; Elevated temperature; Thermomechanical fatigue

Citation

Key Engineering Materials Vols. 306-308 (2006) pp. 205-210

ISSN
1013-9826
URI
http://hdl.handle.net/10203/2917
Link
http://www.scientific.net/0-87849-989-x/205/
Appears in Collection
ME-Journal Papers(저널논문)
  • Hit : 319
  • Download : 10
  • Cited 0 times in thomson ci

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0