journal article·2009-08

Backward extrusion using micro-blanked aluminium sheet

L. Olejnik, W. Presz, A. Rosochowski

Publisher page

Abstract

UFG Al 1070, produced by two-turn, S-channel ECAP, was side upset and rolled to obtain a 1 mm thick sheet. 1mm in diameter cylindrical billets were micro-blanked from the UFG sheet and, for comparison purposes, also from a coarse grained commercially rolled Al 1050 sheet. After calibration the billets were used for backward extrusion of micro-cups. The UFG structure was retained during all these operations, which appeared to be not much different for the two materials. Tooling issues have to be addressed and further investigation is required to account for substantial changes in the strain path for the UFG material.
Source: openaire · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Metal Forming Simulation Techniques · Microstructure and mechanical properties · Metallurgy and Material Forming

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (15)

Show source-provided references
1. Geiger M, Kleiner M, Eckstein R, Tiesler N, Engel U (2001) Microforming Ann CIRP 50(2):445–46210.1016/S0007-8506(07)62991-6 ↗
2. Engel U, Eckstein R (2002) Microforming - from basic research to its realisation. J Mater Process Technol 125–126:35–4410.1016/S0924-0136(02)00415-6 ↗
3. Kocanda A, Prejs T (2000) The effect of miniaturisation on the final geometry of the bent products. In 8th Int. Conf. on Metal Forming, pages 375–378
4. Cao J, Krishnan N, Wang Z, Hongsheng L, Wing KL, Swanson A (2004) Microforming: experimental investigation of the extrusion process for micropins and its numerical simulation using RKEM. Trans ASME 126:642–65210.1115/1.1773195 ↗
5. Presz W, Rosochowski A (2006) The influence of grain size on quality of microformed components. In 9th ESAFORM Conf. on Material Forming, pages 587–590
6. Kim WJ, Sa YK (2006) Micro-extrusion of ECAP processed magnesium alloy for production of high strength magnesium micro-gears. Scr Mater 54:1391–139510.1016/j.scriptamat.2005.11.066 ↗
7. Engel U, Rosochowski A, Geißdörfer S, Olejnik L (2007) Microforming and nanomaterials. In: Chinesta F, Cueto E (eds) Advances in material forming. Springer Verlag, Paris, pp 99–12410.1007/978-2-287-72143-4_7 ↗
8. Rosochowski A, Presz W, Olejnik L, Richert M (2007) Micro-extrusion of ultrafine grained aluminium. Int J Adv Manuf Tech 33:137–14610.1007/s00170-007-0955-6 ↗
9. Geißdörfer S, Rosochowski A, Olejnik L, Engel U, Richert M (2008) Micro-extrusion of ultrafine grained copper. In 11th ESAFORM Conf. on Material Forming10.1007/s12289-008-0093-1 ↗
10. Segal VM (1995) Materials processing by simple shear. Mat Sci Eng A197:157–16410.1016/0921-5093(95)09705-8 ↗
11. Rosochowski A, Olejnik L (2002) Numerical and physical modelling of plastic deformation in 2-turn equal channel angular extrusion. J Mater Process Technol 125–126:309–31610.1016/S0924-0136(02)00339-4 ↗
12. Rosochowski A, Olejnik L, Gagne J, Ladeveze N, Rosochowska M (2006) Compression behaviour of UFG aluminium. In 9th ESAFORM Conf on Material Forming, pp.543–546
13. Kokkonen J, Kuokkala V-T, Olejnik L, Rosochowski A (2008) Dynamic behavior of ECAPprocessed aluminum at high strain rates at room and sub-zero temperatures. In SEM XI Congress, pp. 1–8
14. Olejnik L, Rosochowski A (2008) Scaled-up ECAP with enhanced productivity. Steel Res Int 79(2):439–446
15. Presz W (2005) Reference process for simulation of bulk metal micro-forming. Prace Naukowe Politechniki Warszawskiej. Mechanika (in Polish) 207:77–82