Publication detail

Improvement the root stability of thick welds during electron beam welding

HAVLÍK, P. KOUŘIL, J. DLOUHÝ, I.

Original Title

Improvement the root stability of thick welds during electron beam welding

English Title

Improvement the root stability of thick welds during electron beam welding

Type

conference paper

Language

en

Original Abstract

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.

English abstract

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.

Keywords

Electron beam welding, spiking, steel, titanium alloy, thick welds

Released

12.11.2018

Publisher

Tanger Ltd.

Location

Keltickova 62, 710 00 Ostrava, Czech Republic, EU

ISBN

978-80-87294-84-0

Book

METAL 2018 - Conference Proceedings

Edition

1.

Pages from

700

Pages to

705

Pages count

6

Documents

BibTex


@inproceedings{BUT151215,
  author="Petr {Havlík} and Jan {Kouřil} and Ivo {Dlouhý}",
  title="Improvement the root stability of thick welds during electron beam welding",
  annote="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.",
  address="Tanger Ltd.",
  booktitle="METAL 2018 - Conference Proceedings",
  chapter="151215",
  edition="1.",
  howpublished="electronic, physical medium",
  institution="Tanger Ltd.",
  year="2018",
  month="november",
  pages="700--705",
  publisher="Tanger Ltd.",
  type="conference paper"
}