Thermomechanical Modelling and Simulation of C38 Thixoextrusion Steel

Eric Becker; Laurent Langlois; Véronique Favier; Régis Bigot

doi:10.4028/www.scientific.net/SSP.217-218.130

Paper Titles

Microstructural Evolution of Semi-Solid Type 304 Stainless Steel Deformed Severely by ECAP
p.99

Morphological Evolution of Al-2wt%Si-2.5wt%Cu Alloy Produced by EMS and EMS Enhanced by ECAP
p.105

Wear Properties of Al-17Si Alloys with Variable Fe Levels Formed by Semi-Solid Process
p.111

Squeeze Flow of Thixotropic Semisolid Slurries
p.121

Thermomechanical Modelling and Simulation of C38 Thixoextrusion Steel
p.130

Rheological Behavior of Semisolid Hypoeutectic Cast Iron Alloyed to Chromium
p.138

Experimental Study and Numerical Simulation on the Blistering Defect during Thixocasting
p.144

Semi-Solid Forging Process and Die Design in the Production of Aluminum Thin Plates
p.151

Semi-Solid Metal Processing: "Unlimited" Flow Velocity without Turbulence in Thin Cast Sections
p.159

HomeSolid State PhenomenaSolid State Phenomena Vols. 217-218Thermomechanical Modelling and Simulation of C38...

Thermomechanical Modelling and Simulation of C38 Thixoextrusion Steel

Abstract:

The present paper focuses the modelling and the simulation of a direct thixoextrusion test achieved on C38 semi-solid steel. Many parameters related to thermal, mechanical, material features are involved but are currently unknown. Consequently to validate the modelling and the simulation, it is important to get various experimental informations during the test and to correlate them with simulated results. In a previous paper (Becker et al, 2008), the force-displacement curve, the temperature within the die, the macro and micro structure obtained for different process parameters during thixoextrusion of C38 were investigated. In this work, those results are correlated to those obtained by simulations of the processing. The simulations were performed using the commercial software Forge®. The thermal modelling is based on the heat equation and the thermal boundary conditions involving the heat losses, the thermal conduction within the semi-solid slug and the die and the plastic dissipation as heat source. The latent heat associated to the liquid-solid phase transformation is not considered here. The constitutive equation of the material is given by a multi-scale modelling based on micromechanics and homogenization techniques, labelled as micro-macro modelling (Favier et al, 2009). Friction is modelled using the usual modified Tresca equation. The parameters of the model are determined (i) using literature results and (ii) to match various experimental measurements obtained during the test and described in Becker et al (2008) such as the die temperature during the test and the load-displacement curve. Comparisons between experimental and simulated reveal the presence of complex temperature field and the presence of zones having very low viscosities. These zones contribute actively to the semi-solid material flow.

You might also be interested in these eBooks

Semi-Solid Processing of Alloys and Composites XIII

View Preview

Info:

Periodical:

Solid State Phenomena (Volumes 217-218)

Pages:

130-137

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.217-218.130

Citation:

Cite this paper

Online since:

September 2014

Authors:

Eric Becker*, Laurent Langlois, Véronique Favier, Régis Bigot

Keywords:

Micro-Macro Modelling, Semi-Solid, Steel, Thixoforging, Tool/Slug Heat Exchange

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] Cezard, P. and al., Thixoforming of Steel : a state of the art from an industrial point of view. Journal Solid State Phenomena, 2008. 141-143.

DOI: 10.4028/www.scientific.net/ssp.141-143.25

Google Scholar

[2] Puttgen, W., and al., Thixoforming of steels - A status report. Advanced Engineering Materials, 2007. 9(4): pp.231-245.

Google Scholar

[3] Hirt, G. and al., Thixoforming. Book, Wiley éd., 2009, ISBN: 978-3-527-32204-6.

Google Scholar

[4] Bigot, R. and al., Some approaches on industrialization of steel thixoforging processes. Solid State Phenomena, Volume 192-193, 2013, Pages 521-526.

DOI: 10.4028/www.scientific.net/ssp.192-193.521

Google Scholar

[5] Becker, E., and al., Metallurgical and mechanical analysis from thixoforging steel shape. International Journal of Material Forming, Volume 1, Issue SUPPL. 1, July 2008, Pages 977-980.

DOI: 10.1007/s12289-008-0221-y

Google Scholar

[6] Cezard, P., et al. Thixoforming of Steel: New Tools Conception to Analyse Thermal Exchanges and Strain Rate Effects. AIP Conference Proceedings, 10TH ESAFORM conference, Volume 907, 2007, Pages 1155-1160.

DOI: 10.1063/1.2729670

Google Scholar

[7] Modigell, and al., Two-phase simulations as a development tool for thixoforming processes. Steel Research International, Volume 75, Issue 8-9, August 2004, Pages 513-518.

DOI: 10.1002/srin.200405804

Google Scholar

[8] Favier, V., et al., Transient and non-isothermal semi-solid behaviour: 3D micromechanical modelling. Materials Science and Engineering A, Volume 517, Issue 1-2, 20, 2009, Pages 8-16.

DOI: 10.1016/j.msea.2009.03.018

Google Scholar

[9] Favier, V., et al., Modelling of Semi-solid Processing, Chapter 6: Micromechanics and Homogenization techniques for Disordered Materials: Applications to semi-solid materials. Helen V. Atkinson ed. (2008).

Google Scholar

[10] Becker, E., Investigations expérimentales et numériques pour l'identification des paramètres clefs du procédé de thixoforgeage de l'acier sur le produit mis en forme, thesis, (2009).

Google Scholar

[11] Becker, E., Steel thixoforging: heat exchange impact on the mechanical and metallurgical features of thixoforged samples, Solid State Phenomena Vols. 141-143, 2008, Pages 701-706.

DOI: 10.4028/www.scientific.net/ssp.141-143.701

Google Scholar