Publication detail
Defects in the surface layer of pure molybdenum after WEDM
MOURALOVÁ, K. BENEŠ, L. ZAHRADNÍČEK, R.
Czech title
Defekty povrchové vrstvy čistého molybdenum po obrábění WEDM
English title
Defects in the surface layer of pure molybdenum after WEDM
Type
journal article in Scopus
Language
en
Original abstract
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.
Czech abstract
Využití čistého molybdenu v oblasti vysokoteplotních aplikací ve vakuu vyžaduje velmi přesné obrobení. Vzhle-dem k tomu, že konveční metody obrábění v několika případech nedosahují požadované tvarové a rozměrové přesnosti je nezbytné využítí nekonveční technologii elektroerozivního drátového řezaní (WEDM). Cílem této studie je analýza povrchové a podpovrchové vrstvy čistého molybdenu po obrábění WEDM zhlediska vyskytu defektů. Pomocí kontaktního 3D profilometru byly vyhodnoceny profilové a plošné parametry. Výskyt jednotli-vých defektů na povrchu i pod ním byl studován pomocí metod elektronové mikroskopie a fokusovaného ionto-vého svazku (FIB). Dále bylo stanoveno lokalní chemické složení povrchu obrobku (EDX).
English abstract
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 in Czech
WEDM, elektroerozivní obrábění, čistý molybdén, morfologie povrchu, topografie, chemické složení, trhliny
Keywords in English
WEDM, Electrical Discharge Machining, pure molybdenum, morphology of surface, topography, chemical composion, cracks
Released
07.10.2017
Publisher
UJEP
Location
Ústí nad Labem
ISSN
1213-2489
Volume
2017
Number
5
Pages from–to
786–790
Pages count
5
BIBTEX
@article{BUT140163,
author="Kateřina {Mouralová} and Libor {Beneš} and Jiří {Kovář} and Zdeněk {Karpíšek} and Radim {Zahradníček} and Pavel {Kousal},
title="Defects in the surface layer of pure molybdenum after WEDM ",
year="2017",
volume="2017",
number="5",
month="October",
pages="786--790",
publisher="UJEP",
address="Ústí nad Labem",
issn="1213-2489"
}