Please use this identifier to cite or link to this item:
https://hdl.handle.net/11499/47479
Title: | Numerical modeling of defect formation in friction stir welding | Authors: | Türkan M. Karakaş Ö. |
Keywords: | AZ61 magnesium alloy Coupled Eulerian Lagrangian formulation Defect formation Finite element model Friction stir welding ABAQUS Defects Finite element method Friction Lagrange multipliers Magnesium alloys Numerical models Plastic deformation Research laboratories Welds AZ61 magnesium alloy Coupled eulerian lagrangian formulation Defects formation Eulerian-Lagrangian formulation Feedrate Finite element modelling (FEM) Friction-stir-welding Heat input Weld defects Welding defects Friction stir welding |
Publisher: | Elsevier Ltd | Abstract: | This study presents an investigation of welding defect formation in joining AZ61 magnesium alloy with friction stir welding by means of a 3D finite element model. The numerical model was created and analyzed in the ABAQUS software. This numerical model uses coupled Eulerian Lagrangian formulation, modified Coulomb's friction law, Johnson-Cook material law, mass scaling technique, and temperature dependent friction coefficient values. The numerical model was validated with experimental results in terms of heat input, temperature distribution, plastic deformation type-amount, and weld defect formation in the weld zone. In friction stir welding, the heat input with a certain tool simply changes directly proportional to the ratio of tool rotation speed to tool feed rate for constant tool compressive force. In the numerical model, as in the experimental study, when the ratio of tool rotational speed to tool feed rate is 2, low heat input results in insufficient plastic deformation, leading to the formation of weld defects in the form of void. When the ratio of tool rotational speed to tool feed rate is 3, however, it was observed that sufficient heat input is provided, and no welding defects occur. The generated numerical model enables the determination of the welding defects that occur in the form of voids in the friction stir welding in a very short processing time. Besides, weld seam geometry can be predicted quite accurately with this model. © 2022 Elsevier Ltd | URI: | https://doi.org/10.1016/j.mtcomm.2022.103539 https://hdl.handle.net/11499/47479 |
ISSN: | 2352-4928 |
Appears in Collections: | Mühendislik Fakültesi Koleksiyonu Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
Show full item record
CORE Recommender
SCOPUSTM
Citations
20
checked on Dec 14, 2024
WEB OF SCIENCETM
Citations
16
checked on Dec 20, 2024
Page view(s)
60
checked on Aug 24, 2024
Google ScholarTM
Check
Altmetric
Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.