RT Journal Article
SR Electronic
A1 Mouralova, Katerina
A1 Benes, Libor
A1 Zahradnicek, Radim
T1 Defects in the Surface Layer of Pure Molybdenum after WEDM
JF Manufacturing Technology Journal
YR 2017
VO 17
IS 5
SP 786
OP 790
DO 10.21062/ujep/x.2017/a/1213-2489/MT/17/5/786
UL https://journalmt.com/artkey/mft-201705-0028.php
AB 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.