Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage
Апстракт
This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity and poor weldability. Observations of the macrostructure and microstructure clearly showed typical zones of a FSW joint and the appropriate grain sizes. The finest grains were observed within the nugget, while the coarsest grains are found to be in the HAZ. The ultimate tensile strength is 80.3 % of the parent material. A coupled thermo-mechanical model was developed to study the temperature fields and the plunge force of the alloy EN AW 7049A under different rotating speeds, (300, 400 and 500) r/min, during the FSW process of the plunge stage. A three-dimensional FE model has been developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law... and Coulomb's Law of Friction. Numerical results indicate that the maximum temperature in the FSW process can be increased with an increase in the rotational speed, which can be used to reduce the plunge force.
Кључне речи:
friction-stir welding / welding parameters / metallography / mechanical test / numerical simulation / plunge stage / temperature / forceИзвор:
Materiali in Tehnologije, 2012, 46, 3, 215-221Издавач:
- Institute of Metals and Technology
Колекције
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Perović, Milenko AU - Veljić, Darko AU - Rakin, Marko AU - Radović, Nenad AU - Sedmak, Aleksandar AU - Bajić, Nikola PY - 2012 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2012 AB - This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity and poor weldability. Observations of the macrostructure and microstructure clearly showed typical zones of a FSW joint and the appropriate grain sizes. The finest grains were observed within the nugget, while the coarsest grains are found to be in the HAZ. The ultimate tensile strength is 80.3 % of the parent material. A coupled thermo-mechanical model was developed to study the temperature fields and the plunge force of the alloy EN AW 7049A under different rotating speeds, (300, 400 and 500) r/min, during the FSW process of the plunge stage. A three-dimensional FE model has been developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law and Coulomb's Law of Friction. Numerical results indicate that the maximum temperature in the FSW process can be increased with an increase in the rotational speed, which can be used to reduce the plunge force. PB - Institute of Metals and Technology T2 - Materiali in Tehnologije T1 - Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage EP - 221 IS - 3 SP - 215 VL - 46 UR - https://hdl.handle.net/21.15107/rcub_technorep_2012 ER -
@article{ author = "Perović, Milenko and Veljić, Darko and Rakin, Marko and Radović, Nenad and Sedmak, Aleksandar and Bajić, Nikola", year = "2012", abstract = "This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity and poor weldability. Observations of the macrostructure and microstructure clearly showed typical zones of a FSW joint and the appropriate grain sizes. The finest grains were observed within the nugget, while the coarsest grains are found to be in the HAZ. The ultimate tensile strength is 80.3 % of the parent material. A coupled thermo-mechanical model was developed to study the temperature fields and the plunge force of the alloy EN AW 7049A under different rotating speeds, (300, 400 and 500) r/min, during the FSW process of the plunge stage. A three-dimensional FE model has been developed in ABAQUS/Explicit using the arbitrary Lagrangian-Eulerian formulation, the Johnson-Cook material law and Coulomb's Law of Friction. Numerical results indicate that the maximum temperature in the FSW process can be increased with an increase in the rotational speed, which can be used to reduce the plunge force.", publisher = "Institute of Metals and Technology", journal = "Materiali in Tehnologije", title = "Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage", pages = "221-215", number = "3", volume = "46", url = "https://hdl.handle.net/21.15107/rcub_technorep_2012" }
Perović, M., Veljić, D., Rakin, M., Radović, N., Sedmak, A.,& Bajić, N.. (2012). Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage. in Materiali in Tehnologije Institute of Metals and Technology., 46(3), 215-221. https://hdl.handle.net/21.15107/rcub_technorep_2012
Perović M, Veljić D, Rakin M, Radović N, Sedmak A, Bajić N. Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage. in Materiali in Tehnologije. 2012;46(3):215-221. https://hdl.handle.net/21.15107/rcub_technorep_2012 .
Perović, Milenko, Veljić, Darko, Rakin, Marko, Radović, Nenad, Sedmak, Aleksandar, Bajić, Nikola, "Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage" in Materiali in Tehnologije, 46, no. 3 (2012):215-221, https://hdl.handle.net/21.15107/rcub_technorep_2012 .