Micromilling of coarse-grained and ultrafine-grained Cu99.9E: Effects of material microstructure on machining conditions and surface quality

Pham, Duc Truong, Elkaseer, Ahmed ORCID: https://orcid.org/0000-0002-2500-3617, Popov, Krastimir Borisov, Dimov, Stefan Simeonov, Olejnik, L. and Rosochowski, A. 2009. Micromilling of coarse-grained and ultrafine-grained Cu99.9E: Effects of material microstructure on machining conditions and surface quality. Presented at: 4M 2009: 6th International Conference on Multi-Material Micro Manufacture, Karlsruhe, Germany, 23-25 September 2009. Published in: Saile, V., Ehmann, K. and Dimov, Stefan Simeonov eds. Proceedings of the 6th International Conference on Multi-Material Micro Manufacture. Singapore: Research Publishing, pp. 241-244. 10.3850/4M2009RP001_9047

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Abstract

This paper investigates the machining response of metallurgically and mechanically modified materials, in particular, coarse-grained (CG) Cu99.9E, with an average grain size of 30 µm and ultrafine-grained (UFG) Cu99.9E, with an average grain size of 200 nm, produced by Equal-Channel Angular Pressing (ECAP). A novel high-precision method for assessing the homogeneity of the material microstructure is proposed based on Atomic Force Microscope (AFM) measurements of the coefficient of friction at the atomic scale, enabling the prediction of the minimum chip thickness of the individual grains inside the bulk. The investigation has shown that by refining the material microstructure, the minimum chip thickness has been reduced and a high surface finish can be achieved. Also, the homogeneity of the material microstructure and the resulting surface quality have been improved.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TS Manufactures
Uncontrolled Keywords:	Micromilling, Material microstructure, Grain size effects, Surface finish, Surface defects, ECAP, AFM, Coefficient of friction, Minimum chip thickness
Publisher:	Research Publishing
Last Modified:	10 May 2024 11:14
URI:	https://orca.cardiff.ac.uk/id/eprint/48131

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