Publication detail

Machining of B1914 nickel-based superalloy using wire electrical discharge machining

MOURALOVÁ, K. POLZER, A. BENEŠ, L. BEDNÁŘ, J. ZAHRADNÍČEK, R. PROKEŠ, T. FIALA, Z. FRIES, J.

Czech title

Obrábění niklové superslitiny B1914 pomocí elektroerozivního drátového řezání

English title

Machining of B1914 nickel-based superalloy using wire electrical discharge machining

Type

journal article in Web of Science

Language

en

Original abstract

The unconventional technology of wire electrical discharge machining is a key engineering technology, designed primarily for machining of conventionally difficult machine materials. One of them is nickel alloys, which are majorly used in the aerospace and energy industries. The subject of research in this study was specifically the B1914 nickel-based superalloy, which was subjected to many analyses leading to an overall optimization of its machining using wire electrical discharge machining. In order to determine the effect of machine parameters setup (pulse off time, gap voltage, discharge current, pulse on time and wire feed) on cutting speed, topography, morphology, surface and subsurface layer quality, an extensive Box-Behnken design experiment consisting of 46 rounds was carried out. The analyses of the condition of the surface and subsurface layers were performed, including their chemical composition and changes caused by wire electrical discharge machining. It was found out that the factors like pulse off time, discharge current and pulse on time have the greatest effect on the cutting speed, although from the point of view of surface topography the parameter pulse off time is not significant. The remaining two parameters cause the cutting speed to act against the surface topography i.e. with the increasing cutting speed, the surface topography gets worse and vice versa.

Czech abstract

Nekonvenční technologie elektroerozivního drátového řezání (WEDM) je klíčovou strojírenskou technologií, určenou především pro obrábění konvenčně obtížně obrobitelných materiálů. Jedním z takových jsou i niklové slitiny, které jsou především používány v leteckém a energetickém průmyslu. Předmětem zkoumání v této studii byla konkrétně niklová superslitina B1914, která byla podrobena mnoha analýzám vedoucím k celkové optimalizaci jejího obrábění pomocí WEDM. Za účelem zjištění vlivu nastavení parametrů stroje (pulse off time, gap voltage, discharge current, pulse on time a wire feed) na rychlost řezání, topografii, morfologii, jakost povrchové i podpovrchové vrstvy byl proveden rozsáhlý plánovaný experiment typu Box-Behnken Design čítající 46 kol. Byly provedeny analýzy stavu povrchové i podpovrchové vrstvy včetně jejich chemického složení a změn způsobených WEDM. Bylo zjištěno, že na rychlost řezání nejvíce působí faktory Pulse off time , Discharge current a Pulse on time avšak z hlediska topografie povrchu není parametr Pulse off time významný. Zbylé dva parametry způsobují, že cutting speed působí proti topografii povrchu, tedy s rostoucí rychlosti řezání se zhoršuje topografie povrchu a naopak.

English abstract

The unconventional technology of wire electrical discharge machining is a key engineering technology, designed primarily for machining of conventionally difficult machine materials. One of them is nickel alloys, which are majorly used in the aerospace and energy industries. The subject of research in this study was specifically the B1914 nickel-based superalloy, which was subjected to many analyses leading to an overall optimization of its machining using wire electrical discharge machining. In order to determine the effect of machine parameters setup (pulse off time, gap voltage, discharge current, pulse on time and wire feed) on cutting speed, topography, morphology, surface and subsurface layer quality, an extensive Box-Behnken design experiment consisting of 46 rounds was carried out. The analyses of the condition of the surface and subsurface layers were performed, including their chemical composition and changes caused by wire electrical discharge machining. It was found out that the factors like pulse off time, discharge current and pulse on time have the greatest effect on the cutting speed, although from the point of view of surface topography the parameter pulse off time is not significant. The remaining two parameters cause the cutting speed to act against the surface topography i.e. with the increasing cutting speed, the surface topography gets worse and vice versa.

Keywords in Czech

Elektroerozivní drátové řezání; niklová slitina; B1914; plánovaný experiment; parametry obrábění

Keywords in English

Wire electrical discharge machining; nickel alloy; B1914; design of experiment; machining parameters

Released

24.11.2021

Publisher

SAGE PUBLICATIONS LTD

Location

LONDON

ISSN

0954-4089

Volume

235

Number

6

Pages from–to

2141–2153

Pages count

13

BIBTEX


@article{BUT172663,
  author="Kateřina {Mouralová} and Aleš {Polzer} and Libor {Beneš} and Josef {Bednář} and Radim {Zahradníček} and Tomáš {Prokeš} and Zdeněk {Fiala} and Jiří {Fries},
  title="Machining of B1914 nickel-based superalloy using wire electrical discharge machining",
  year="2021",
  volume="235",
  number="6",
  month="November",
  pages="2141--2153",
  publisher="SAGE PUBLICATIONS LTD",
  address="LONDON",
  issn="0954-4089"
}