Étude expérimentale et numérique du procédé de soudage FSW (Friction Stir Welding). Analyse microstructurale et modélisation thermomécanique des conditions de contact outil/matière transitoires.

Abstract : Friction Stir Welding is a solid state joining process developed for transport applications as aerospace and naval. Since its introduction, a large number of investigations have been carried out but the process is not fully controlled. This work including experimental section in which welds have been generated by trigonal tool. The microstructure of these welds has been correlated with the material flow during the process. By understanding the material flow, the transient thermofluid model developed in the second section has been significantly enriched. This modeled has been developed for predicting the microstructure of the weld, especially, the "onion rings". Finally, the occurrence of "onion rings" has been correlated with the maximal strain rate reached by any particle in the weld seam, simulated by the model. However, the velocity has been refined at the vicinity of the tool through the trigonal pin modelling. This was helpful to move the material not only by friction but also by obstacle at the interaction tool/material. The above approach should enable, in this work layout, a better local thermomechanical description and consequently microstructural.
Document type :
Theses
Complete list of metadatas

Cited literature [124 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01150566
Contributor : Abes Star <>
Submitted on : Monday, May 11, 2015 - 2:57:07 PM
Last modification on : Wednesday, October 24, 2018 - 1:01:18 AM
Long-term archiving on : Monday, September 14, 2015 - 10:15:36 PM

File

amevi-tongne-diff.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01150566, version 1

Collections

Citation

Amèvi Tongne. Étude expérimentale et numérique du procédé de soudage FSW (Friction Stir Welding). Analyse microstructurale et modélisation thermomécanique des conditions de contact outil/matière transitoires.. Autre. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2014. Français. ⟨NNT : 2014EMSE0768⟩. ⟨tel-01150566⟩

Share

Metrics

Record views

782

Files downloads

5822