Investigation of Tribological Properties of AlMg4,5Mn0,7 in a Warm Forming Process Using the Barrel Compression Test

Benedikt Müller; Stephan F. Jahn; Ru Fang; Andreas Schubert

doi:10.4028/www.scientific.net/KEM.651-653.633

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 651-653Investigation of Tribological Properties of...

Investigation of Tribological Properties of AlMg4,5Mn0,7 in a Warm Forming Process Using the Barrel Compression Test

Abstract:

Within the German Collaborative Research Center 39 PT-PIESA the forming of micro cavities into aluminum sheets is one challenging task. During this forming process high forces and stresses occur which lead to a high tool wear. Hence, the actually applied cold forming process should be replaced by a warm forming process. This paper shows the tribological investigations for the warm forming process. Within the experiments the barrel compression test is used to determine the friction conditions by varying the size of the cylindrically shaped samples of AlMg4,5Mn0,7, the forming degree and the lubrication condition (dry, graphite, forming oil). The flat punches were made from hardened steel 1.3343. The friction factor was calculated, and surface roughness was evaluated by 3D-laser microscopy. The experiments show that the friction factor increases, especially at forming degrees below 1 and for small specimen size, compared to cold forming processes. In addition to that, an influence of the lubrication condition onto the surface roughness was observed. For experiments conducted with graphite, the surface roughness is significantly higher than for samples, which were formed dryly or with forming oil.

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Periodical:

Key Engineering Materials (Volumes 651-653)

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633-638

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https://doi.org/10.4028/www.scientific.net/KEM.651-653.633

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Online since:

July 2015

Authors:

Benedikt Müller*, Stephan F. Jahn, Ru Fang, Andreas Schubert

Keywords:

Aluminium, Dry Forming, Forming Oil, Friction Factor, Graphite, Warm Forming

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References

[1] R. Ebrahimi, A. Najafizadeh: A new method for evaluation of friction in bulk metal forming. J. Mater. Process. Technol. 152 (2004) 136-143.

DOI: 10.1016/j.jmatprotec.2004.03.029

Google Scholar

[2] A. Schubert, S. F. Jahn, B. Müller: Evaluation of tribological properties of AlMg4. 5Mn0. 7 in massive microforming using the barrel compression test. Key Eng. Mater. 611-612 (2014) 597-605.

DOI: 10.4028/www.scientific.net/kem.611-612.597

Google Scholar

[3] A. Schubert, V. Wittstock, H. -J. Koriath, S. F. Jahn, S. Peter, B. Müller, M. Müller, Smart metal sheets by direct functional integration, Microsyst. Technol. 20 (2014) 1131-1140.

DOI: 10.1007/s00542-013-1836-6

Google Scholar

[4] U. Engel, R. Eckstein, Microforming - from basic research to its realization. J. Mater. Process. Technolog. 125-126 (2002) 35-44.

DOI: 10.1016/s0924-0136(02)00415-6

Google Scholar

[5] A. Schubert, V. Wittstock, S. F. Jahn, B. Müller, M. Müller, Joining by forming of piezoceramic macro-fiber arrays within micro-structured surfaces of aluminum sheets, Prod. Eng. - Research and Development 8 (2014) 195-205.

DOI: 10.1007/s11740-013-0498-7

Google Scholar

[6] A. Schubert, S. F. Jahn, B. Müller, Modular tool concept and process design for micro impact extrusion, Precis. Eng. 38 (2014) 57-63.

DOI: 10.1016/j.precisioneng.2013.07.004

Google Scholar

[7] F. Ostermann, Anwendungstechnologie Aluminium, Springer (1998).

Google Scholar

[8] P. Groche, J. Stahlmann, J. Hartel, M. Köhler, Hydrodynamic effects of macroscopic deterministic surface structures in cold forging processes, Tribol. Int. 42 (2009) 1173-1179.

DOI: 10.1016/j.triboint.2009.03.019

Google Scholar

[9] M. Geiger, M. Kleiner, R. Eckstein, N. Tiesler, U. Engel, Microforming, CIRP Annals - Manufacturing Technology 50/2 (2001) 445-462.

DOI: 10.1016/s0007-8506(07)62991-6

Google Scholar

[10] U. Engel, Tribology in Microforming, Wear 260 (2006) 265-273.

DOI: 10.1016/j.wear.2005.04.021

Google Scholar

[11] B. Eichenhüller, U. Engel, Investigation of Parameter Interactions in Microforming, Proceedings of the 3rd ICOMM'08 (2008) 207-210.

Google Scholar

[12] Y. Zhu, W. Zeng, X. Ma, Q. Tai, Z. Li, X. Li, Determination of the friction factor of Ti-6Al-4V titanium alloy in hot forging by means of ring-compression test using FEM, Tribol. Int. 44 (2011) 2074-(2080).

DOI: 10.1016/j.triboint.2011.07.001

Google Scholar

[13] E. Ceretti, A. Fiorentino, C. Giardini, Process parameters influence on friction coefficient in sheet forming operations, Int. J. Mater. Form. 1/1 (2008) 1219-1222.

DOI: 10.1007/s12289-008-0161-6

Google Scholar