Manufacturing Technology 2017, 17(5):786-790 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/5/786

Defects in the Surface Layer of Pure Molybdenum after WEDM

Katerina Mouralova1, Libor Benes2, Radim Zahradnicek3
1 Faculty of Mechanical Engineering, Brno University of Technology. Technicka 2896/2, 616 69 Brno. Czech Republic
2 Faculty of Mechanical Engineering, J. E. Purkyne University in Usti nad Labem. Pasteurova 3334/7, 400 01 Usti nad Labem. Czech Republic
3 Faculty of Electrical Engineering and Communication, Brno University of Technology. Technicka 3058/10, 616 00 Brno. Czech Republic

The utilisation of pure molybdenum in high-temperature applications in a vacuum requires very precise machining. Considering the fact that conventional machining methods do not achieve the required geometrical and dimensional accuracy in several cases, it is necessary to use the unconventional technology of wire electrical discharge machining (WEDM). This study aims at analysing the surface and subsurface layer of pure molybdenum after WEDM in terms of the occurrence of defects. Profile and areal parameters were evaluated by means of a contact 3D profilometer. The occurrence of individual defects both on the surface and underneath it was studied by means of the methods of electron microscopy and focused ion beam (FIB). Furthermore, the local chemical composition of the surface of the workpiece (EDX) was determined.

Keywords: WEDM, Electrical Discharge Machining, pure molybdenum, morphology of surface, topography, chemical composition, cracks

Published: October 1, 2017  Show citation

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Mouralova K, Benes L, Zahradnicek R. Defects in the Surface Layer of Pure Molybdenum after WEDM. Manufacturing Technology. 2017;17(5):786-790. doi: 10.21062/ujep/x.2017/a/1213-2489/MT/17/5/786.
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