Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling

Tools

Toumpis, Athanasios and Galloway, Alexander and Arbaoui, Larbi and Poletz, Nicolas (2014) Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling. Science and Technology of Welding and Joining, 19 (8). pp. 653-663. ISSN 1362-1718 (https://doi.org/10.1179/1362171814Y.0000000239)

[thumbnail of Toumpis A et al - Pure - Thermomechanical deformation behaviour of DH36 steel during friction stir welding by experimental validation and modelling Jul 2014] PDF. Filename: Toumpis_A_et_al_Pure_Thermomechanical_deformation_behaviour_of_DH36_steel_during_friction_stir_welding_by_experimental_validation_and_modelling_Jul_2014.pdf
Accepted Author Manuscript
Download (1MB)

Abstract

Friction stir welding is a solid state thermo-mechanical deformation process from which the plasticisation behaviour of the stirred material can be evaluated throuh the study of flow stress evolution. Flow stress data also supporting the development of a local microstructural numerical model have been generated. Hot compression testing of DH36 steel has been performed at a temperature range of 700ºC-1100ºC and strain rates from 10-³ s-¹ to 10² s-¹ to study the alloy's thermo-mechanical deformation behaviour in conditions which simulate the actual friction stir welding process. It has been found that the evolution of flow stress is significantly affected by the test temperature and deformation rate. The material's constitutive equation and constants have been calculated after analysis of these data. Preliminary numerical analysis results are in good agreement with experimental observations.

ORCID iDs

Toumpis, Athanasios ORCID logoORCID: https://orcid.org/0000-0003-3245-4536, Galloway, Alexander ORCID logoORCID: https://orcid.org/0000-0003-0143-8314, Arbaoui, Larbi and Poletz, Nicolas;
CORE (COnnecting REpositories)