Evaluation of Surface Roughness and Defect Formation after The Machining of Sintered Aluminum Alloy AlSi10Mg

Grzegorz Struzikiewicz; Andrzej Sioma

doi:10.3390/ma13071662

Evaluation of Surface Roughness and Defect Formation after The Machining of Sintered Aluminum Alloy AlSi10Mg

Materials (Basel). 2020 Apr 3;13(7):1662. doi: 10.3390/ma13071662.

Authors

Grzegorz Struzikiewicz¹, Andrzej Sioma²

Affiliations

¹ Production Engineering Institute, Mechanical Faculty, Cracow University of Technology, 31-155 Kraków, Poland.
² Department of Process Control, Faculty of Mechanical Engineering and Robotics, AGH University of Science and Technology, 30-059 Kraków, Poland.

Abstract

This article presents selected issues related to the workpiece surface quality after machining by the laser sintering of AlSi10MG alloy powder. The surfaces of the workpiece were prepared and machined by longitudinal turning with tools made of sintered carbides. The occurrence of breaches on the machined material surface was found, which negatively influence the values of 3D surface roughness parameters. The occurring phenomena were analyzed and proposals for their explanation were made. Guidelines for the machining of workpieces achieved by the laser sintering of powders were developed. The lowest value of the 3D roughness parameters was obtained for f = 0.06 mm/rev, a_p = 0.5-1.0 mm, and for the nose radius of cutting insert r_ε = 0.8 mm. The results of research on the effect of cutting parameters on the values of parameters describing the surface quality are presented. Topography measurements and 3D surface roughness parameters are presented, as well as the results of a microscopic 3D surface analysis. Taguchi's method was used in the research methodology.

Keywords: 3D surface roughness parameters; machining; sintered aluminum; surface defects.