Paper Titles
Insights to Extrusion from Finite Element Modeling
p.95
Study on Thixo-Extrusion of Semi-Solid Wrought Magnesium Alloy
p.103
Microstructure Prediction of Hot-Deformed Aluminium Alloys
p.107
Application of Adaptive Mesh and ALE Method in Simulation of Extrusion of Aluminum Alloys
p.117
Seam Welds Modeling and Mechanical Properties Prediction in the Extrusion of AA6082 Alloy
p.125
A Laboratory Scale Equipment to Relieve Force and Pressure in Cold Extrusion of Lead Hollow Components
p.137
Analysis of Metal Flow through a Porthole Die to Produce a Rectangular Hollow Profile with Longitudinal Weld Seams
p.145
Simulation-Based Design of Ram Speed Profile for Isothermal Extrusion
p.153
Input Parameters Determination for Predicting Ram Speed and Billet Temperature for the First Billet
p.161

Seam Welds Modeling and Mechanical Properties Prediction in the Extrusion of AA6082 Alloy

Article Preview

Abstract:

This work summarizes the outcome of recent research by the authors on modeling the formation of seam welds in aluminum extrusion and on evaluating the related mechanical properties on the final products. A profile with a seam weld in the middle section was produced with different die designs in order to investigate the relation between die design and local welding parameters, such as contact pressure, temperature, time of contact, strain and strain rate paths. The local welding conditions were evaluated by complete thermo-mechanical 3D FEM simulation of the processes. Specimens were extracted from the profiles and tensile tested, the resulting mechanical properties being discussed with respect to the local welding conditions. The possibility to adopt criteria for assessing the welding quality is discussed, together with the effect of high speed damage cracking.

You might also be interested in these eBooks
Advances on Extrusion Technology and Simulation of Light Alloys View Preview

Info:

Periodical:

Key Engineering Materials (Volume 367)

Pages:

125-136

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.367.125

Citation:

Cite this paper

Online since:

February 2008

Authors:

Lorenzo Donati, Luca Tomesani

Keywords:

AA6082 Aluminium Alloy, Extrusion, Finite Element (FE) Simulation, Seam Weld, Welding Criteria

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Akeret R., Properties of pressure welds in extruded aluminum alloy sections, journal of the institute of metals, 10, (1972), p.202.

Google Scholar

[2] Akeret R., Extrusion welds-Quality aspects are now center stage, Proceedings of ET 1992, vol. I, (1992) pp.319-336.

Google Scholar

[3] Valberg H., Extrusion welding in aluminium extrusion, Int. J. of Materials and Product Technology, Vol. 17, N. 7, 2002, pp.497-556.

DOI: 10.1504/ijmpt.2002.001317

Google Scholar

[4] Valberg H., Loeken T., Hval M., The extrusion of hollow profiles with a gas pocket behind the bridge, Int. J. of Materials and Product Technology, Vol. 10, Nos 3-6, (1995), pp.222-267.

Google Scholar

[5] Plata M., Piwnik J., Theoretical and experimental analysis of seam weld formation in hot extrusion of aluminum alloys, Proc. 7 th Int. aluminum extrusion technology seminar ET 2000, vol. I, (2000), pp.205-211.

DOI: 10.31399/asm.tb.aet.t68260187

Google Scholar

[6] Bourqui B, A. Huber, C Moulin, A. Bunetti, Improved weld seam quality using 3D FEM simulations in correlation with practice, Proceedings of first EAA (European Aluminum Association-extruders division-) Montichiari -BS-, (2002).

Google Scholar

[7] Donati L., Tomesani L., The prediction of seam welds quality in aluminum extrusion, Journal of Material Processing Technology, 153-154, (2004), pp.366-373.

DOI: 10.1016/j.jmatprotec.2004.04.215

Google Scholar

[8] Donati L., Tomesani L., Evaluation of a new FEM criterion for seam welds quality prediction in aluminum extruded profiles, Proceedings of 8 th Int. Conf. Aluminum Extrusion technology Seminar (ET2004), Orlando, 18-21 May 2004, vol. 2, pp.221-235.

DOI: 10.1016/j.jmatprotec.2004.04.215

Google Scholar

[9] Donati L., Tomesani L., The effect of die design on the production and seam weld quality of extruded aluminium profiles, J. of Material Processing Technology, 164-165 (2005) pp.1025-1031.

DOI: 10.1016/j.jmatprotec.2005.02.156

Google Scholar

[10] Fratini L., Tomesani L., Donati L., Buffa G., Solid state bonding in extrusion and FSW: process mechanics and analogies, J. Mat. Processing Technology, 177/1-3 (2006), pp.344-347.

DOI: 10.1016/j.jmatprotec.2006.04.042

Google Scholar

[11] J. Lof, J. Heutink, FEM simulations of the material flow in the bearing area of the aluminum extrusion process, Proc. 7 th Int. aluminum extrusion technology seminar ET 2000, vol. II, (2000) pp.211-222.

Google Scholar

[12] Edwards S. -P., Bakker A.J. den, Neijenhuis J.L., Kool W.H., Katgerman L., JSME International Journal, Series A 49/1, (2006), pp.63-68.

Google Scholar

[13] Donati L., Tomesani L., Minak G., Characterization of seam weld quality in AA6082 extruded profiles Journal of Materials Processing Technology 191 (2007) pp.127-131.

DOI: 10.1016/j.jmatprotec.2007.03.073

Google Scholar

[14] Donati L., Tomesani L., Deformability prediction in aluminum extruded hollow profiles by means of process simulation, Acts 7° Conf. AITEM Lecce, September 2005, pp.123-124.

Google Scholar

[15] Donati L., Tomesani L., Prediction of hot damage in aluminum extrusion by means of FEM simulations, Proc. 7th WCCM (World Congress on Computational Mechanics) Los Angeles (2006).

Google Scholar