Material microstructure effects in micro-endmilling of Cu99.9E
Ahmed M. Elkaseer , S.S. Dimov , D.T. Pham , Lech Olejnik , K.P. Popov , Andrzej Rosochowski
AbstractThis article presents an investigation of the machining response of metallurgically and mechanically modified materials at the micro-scale. Tests were conducted that involved micro-milling slots in coarse-grained Cu99.9E with an average grain size of 30 mm and ultrafine-grained Cu99.9E with an average grain size of 200 nm, produced by equal channel angular pressing. A new method based on atomic force microscope measurements is proposed for assessing materials’ microstructure effects in micro-machining, that is, the effects of material homogeneity changes on the minimum chip thickness required for a robust micro-cutting processes with a minimum surface roughness. The investigation has shown that by refining the material microstructure the minimum chip thickness can be reduced and a high surface finish can be obtained. Also, it was concluded that material homogeneity improvements lead to a reduction in surface roughness and surface defects in micro-cutting
|Journal series||Proceedings of the Institution of Mechanical Engineers Part B-Journal of Engineering Manufacture, ISSN 0954-4054|
|Publication size in sheets||0.6|
|Keywords in English||Micro-endmilling, material microstructure, grain size effects, surface finish, surface defects, equal channel angular pressing, atomic force microscope, minimum chip thickness|
|Publication indicators||: 2016 = 1.366 (2) - 2016=1.386 (5)|
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