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ASTM Selected Technical Papers
Acoustic Emission: Current Practice and Future Directions
By
W Sachse
W Sachse
1
Cornell University
?
Ithaca, NY
USA
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K Yamaguchi
K Yamaguchi
2
University of Tokyo
?
Tokyo,
Japan
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J Roget
J Roget
3
Nordon & Cie
?
Nancy,
France
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ISBN-10:
0-8031-1389-7
ISBN:
978-0-8031-1389-3
No. of Pages:
459
Publisher:
ASTM International
Publication date:
1991

This paper describes the use of acoustic emission analysis (AEA) to monitor and control an electron beam welding process. For this to be successful requires that the signals emitted during the welding process be detected and that a good correlation can be established between the welding parameters and the acoustic signals. Weld monitoring applications place special requirements on both the electronic system as well as the sensor used to detect the AE signals. These requirements include a good directional selectivity and a capability for operation at high-temperatures which limits the use of piezoelectric sensors. In this paper the application of non-contact, electromagnetic acoustic transducers is described. The operation of such a sensor to detect the acoustic emissions accompanying an electron beam welding process is demonstrated and their application in a weld-monitoring system is described.

1.
Crostack
,
H.-A.
and
Storp
,
H.-J.
: “
Acoustic Emission Analysis-An Integral Method for Process Control during Welding
” in “Acoustic Emission,” edited by
Eisenblätter
J.
,
DGM Informationsgesellschaft
,
Oberusel
,
1988
.
2.
Crostack
,
H.-A.
,
Steffens
,
H.-D.
,
Kern
,
H.
, and
Morlo
,
H.
:
Untersuchungen zur Anwendung der Schallemissionsanalyse für die zerstorungsfreie Prüfung von Abbrennstumpf Schweißverbindungen
,”
Schhweißen und Schneiden
40
(
1988
), Heft 10.
3.
Prine
,
D. W.
: “
Acoustic Emission Monitoring during Welding, a Powerful NDT Tool
,” 5th. Intern. Acoustic Emission Symp.,
Tokyo
,
1980
.
4.
Steffens
,
H.-D.
,
Jüptner
,
W.
, and
Crostack
,
H.-A.
:
Anwendung der Schallemissionsanalyse zur Überwachung des Elektronenstrahlschweißprozesses
,
Strahltechnik VII, DVS-Berichte
Band
34
,
1975
.
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