This article presents our results of the part of the European AWFORS Project related to single crystal blade repairing by laser cladding.

First, we present the overview of the project and the aims related to single crystal blades.

Thus, physical metallurgy considerations are presented. These elements related to the process modelling are followed by a process parameter search. The materials used are both single crystal superalloys CMSX2 and MC2.

Once the parameters are relatively defined, a process control is set up in order to improve the stability of the process.

A coaxial CMOS camera allows registering the images of the cladding process. The control system processes the image and computes a set of parameters needed to tune the process in line.

The presentation ends with a presentation on repairing trial on real blades, taking into account the real geometry. This will evidence the possibility to make an epitaxial repair of this type of blades.

1.
S.
Nowotny
,
S.
Scharek
,
T.
Naumann
,
R.
Zieris
,
E.
Beyer
, (
2000
),
Innovations in Laser Cladding, Proceedings of the Laser Materials Processing, Conference ICALEO 2000
,
LIA
Vol.
89a
,
2.
I.
Kelbassa
,
A.
Gasser
,
G.
Backes
,
S.
Keutgen
,
E. W.
Kreutz
,
N.
Pirc
 (
2002
)
Repair and (re)conditioning of compressor and turbine blades by CO2 and Nd:YAG laser radiation
,
Materials for Advanced Power Engineering 2, Proceedings of the 7th Liège Conference Part II, Pages
751
–
758
,
Google Scholar
 
3.
Investigation Solidification with the Laser-Engineered Net Shape (LENStm) Process
,
William
Hofmeister
,
John
Smugresky
,
Joel A.
Philliber
,
Michelle
Griffith
, and
Mark
Ensz
4.
M.
Gäumann
, (
1999
)
Epitaxial Laser metal forming of a single crystal superalloy
, PhD Thesis
Institut of Materials, Swiss Federal Institut of Technology (EPFL)
:
Lausanne
,
Google Scholar
 
5.
S.
Mokadem
, (
2005
)
Epitaxial Laser Treatment of Single Crystal Nickel-based Supperalloy
, Ph Thesis,
Ecole Polytechnique Fédérale de Lausanne
,
Google Scholar
 
6.
C.
Bezençon
,
M.
Konter
,
J-D
Wagnière
,
W.
Kurz
, (
2001
) Microstructure development in laser cladding of single crystal nickel based alloys, in
Laser in manufacturing
,
Munich, Germany
,
7.
S.
Mokadem
,]
C.
Bezençon
,
J-M.
Drezet
,
A.
Jacot
,
J-D
Wagnière
,
W.
Kurz
, (
2004
) Microstructure control during single crystal laser welding and deposition of ni-based superalloys,
TMS
8.
A.
Weisheit
,
G.
Backes
,
R.
Stromeyer
,
A.
Gasser
,
K.
Wissenbach
,
R.
Poprawe
 (
2001
),
Powder Injection: the key to reconditioning and generating components using laser cladding
,
Proceedings of Materials Week
, Pages
1
–
8
,
Google Scholar
 
9.
T.
Mutabue
,
C.
Colin
,
T.
Malot
,
P.
Aubry
 (
2004
)
Influence of process monitoring devices on direct manufacturing by laser cladding for aeronautic components
, ICALEO2004
Google Scholar
 
This content is only available via PDF.
© 2005 Laser Institute of America.
2005
Laser Institute of America
You do not currently have access to this content.