Thermally-activated hardening recovery in viscoplastic materials with kinematic hardening at high temperatures. (May 2023)

• Record Type: Journal Article
• Authors: Thiercelin, Léo; Praud, Francis; Meraghni, Fodil; Fleury, Eric
• Is Part Of: Mechanics of materials. Volume 180(2023)
• Publication Date: 2023-05
• Subjects: Constitutive model -- Viscoplasticity -- Kinematics hardening -- Hardening recovery -- Thermomechanical behaviour; Strength of materials -- Periodicals; Mechanics, Applied -- Periodicals; Résistance des matériaux -- Périodiques; Mécanique appliquée -- Périodiques; Mechanics, Applied; Strength of materials; Periodicals; Electronic journals; 620.11
• DOI: 10.1016/j.mechmat.2023.104636
• Languages: English
• ISSNs: 0167-6636

Abstract

Abstract: In this work, a new constitutive model is proposed to describe the thermally-activated hardening recovery mechanism in metallic materials. This model takes up the concept of hardening recovery variable, which is extended to the case of kinematic hardening within a thermo-viscoplastic formulation including high temperature dependencies for both elastic and viscoplastic properties. The model is identified for AISI 316L austenitic stainless steel using experimental data from uni-axial tests conducted over a wide range of temperature (from room temperature to 1273 K) and at two different strain rates ( 2 . 5 × 1 0 − 4 and 2 . 5 × 1 0 − 3 s −1 ). Validation is further achieved with rather good agreements by comparing the simulated responses with additional experimental data where the material is subjected to complex thermomechanical loading paths while other examples are presented to provide a better insight of the model and to illustrate its predictive capabilities. Highlights: Constitutive model describing the thermally-activated hardening recovery in metals. Wide range temperature-dependent viscoplastic formulation with kinematic hardening. Extension of the hardening recovery concept to kinematic hardening rule. Experimental identification and validation for AISI 316L austenitic stainless steel. Predictive capabilities on complex thermomechanical loading paths.