Improvement the root stability of thick welds during electron beam welding

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU129745" target="_blank" >RIV/00216305:26210/18:PU129745 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Improvement the root stability of thick welds during electron beam welding

Popis výsledku v původním jazyce

Electron beam (EB) welding of thick materials is not an easy task and finding the correct welding parameters and conditions is one of the crucial factors especially when the quality of weld root is required. The undesirable features of an electron beam weld can lead to premature failure or reduces the effectiveness of the resulting components (for example impellers). In attempts to understand how these defects are formed, the formation of EB cavity is primary importance. The greatest significance is attributed to the cavity oscillation in size and shape due to the rapid pressure and temperature changes which occurs during formation of EB cavity. These dynamic behaviors of molten metal during EBW enable creation of liquid metal protrusions in cavity instabilities - spiking. In the preset paper the initial results of several steel and titanium plates with different thickness welded without filler metal are presented. During the welding various approaches have been verified to eliminating the spiking. For spiking elimination the modification of weld joint configuration was tested, using of solder, using of background material and modification of EB welding process parameters. The obtained results are complemented by microstructure analysis and by evaluation of the quality and appearance of the weld root.

Název v anglickém jazyce

Improvement the root stability of thick welds during electron beam welding

Popis výsledku anglicky

Electron beam (EB) welding of thick materials is not an easy task and finding the correct welding parameters and conditions is one of the crucial factors especially when the quality of weld root is required. The undesirable features of an electron beam weld can lead to premature failure or reduces the effectiveness of the resulting components (for example impellers). In attempts to understand how these defects are formed, the formation of EB cavity is primary importance. The greatest significance is attributed to the cavity oscillation in size and shape due to the rapid pressure and temperature changes which occurs during formation of EB cavity. These dynamic behaviors of molten metal during EBW enable creation of liquid metal protrusions in cavity instabilities - spiking. In the preset paper the initial results of several steel and titanium plates with different thickness welded without filler metal are presented. During the welding various approaches have been verified to eliminating the spiking. For spiking elimination the modification of weld joint configuration was tested, using of solder, using of background material and modification of EB welding process parameters. The obtained results are complemented by microstructure analysis and by evaluation of the quality and appearance of the weld root.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2018 - Conference Proceedings

ISBN

978-80-87294-84-0

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

700-705

Název nakladatele

Tanger Ltd.

Místo vydání

Keltickova 62, 710 00 Ostrava, Czech Republic, E

Místo konání akce

Brno

Datum konání akce

23. 5. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000461832200108