High-Temperature Inelastic Behavior of the Austenitic Steel AISI Type 316

Chapter
Part of the Advanced Structured Materials book series (STRUCTMAT, volume 19)

Abstract

A conventional material model is extended to taking into account of varying thermo-mechanical loading conditions in a wide stress range. The developed model basis is a creep constitutive law in the form of the hyperbolic sine stress response function originally proposed by Nadai. The extension is done by incorporation of two additional inner variables reflecting hardening and recovery effects under cyclic loading conditions. The first one is presented by the relatively fast saturating back-stress \(K\) describing the kinematic hardening. The second one is presented by the relatively slow saturating parameter \(H\) describing the isotropic hardening. Evolution equations for \(K\) and \(H\) originally proposed by Chaboche are formulated in a modified form and based on the Frederick-Armstrong concept. The uniaxial modelling results are compared with cyclic stress-strain diagrams and alternative experimental data in the form of creep curves, tensile stress-strain diagrams, relaxation curves, etc. for the austenitic steel AISI type 316 at 600\(\,^{\circ }\)C in a wide stress range.

Keywords

Creep Strain Creep Curve Isotropic Hardening Kinematic Hardening Inelastic Strain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Engineering MechanicsOtto-von-Guericke University MagdeburgMagdeburgGermany
  2. 2.Department of Mechanical and Aerospace EngineeringUniversity of StrathclydeGlasgowUK

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