MTS Model Application to Materials Not Starting in the Annealed Condition

Author:

Follansbee Paul

Abstract

Application of the Mechanical Threshold Stress constitutive model becomes challenging when the material of interest is not supplied in the annealed condition with a low initial dislocation density. When the material has some existing warm or cold work, the evaluation of the internal state variables, specification of the activation energies, and analysis of strain hardening can be affected. This paper gives an example of this in molybdenum and presents options for proceeding with the model development. A hypothetical Body-Centered Cubic (BCC) alloy with known model variables is used to demonstrate the issues and solution options.

Publisher

MDPI AG

Subject

General Materials Science

Reference14 articles.

1. A Constitutive Description of the Deformation of Copper Based on the Use of the Mechanical Threshold Stress as an Internal State Variable;Acta Metall.,1988

2. Follansbee, P.S. (2022). Fundamentals of Strength: Principles, Experiment, and Applications of an Internal State Variable Constitutive Formulation, Springer Nature. [2nd ed.].

3. On the Definition of State Variables for an Internal State Variable Constitutive Model Describing Metal Deformation;Mater. Sci. Appl.,2014

4. Chalmers, B., Christian, J.W., and Massalski, T.B. (1975). Progress in Materials Science, Pergamon Press.

5. An Internal State Variable Constitutive Model for Deformation of Austenitic Stainless Steels;J. Eng. Mater.Technol.,2012

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