A new high temperature brazing technology for the repair of turbine components made of single crystalline nickel based superalloys has been developed. It allows the repair of single crystalline parts by producing an epitaxially grown braze gap within very short times. In contrast to commonly used brazing technologies, the process is not diffusion based but works with consolute systems, particularly nickel-manganese alloys. Brazing experiments with wide parallel braze gaps, as well as V-shaped gaps with a maximum width of , were conducted. Furthermore, thermodynamic simulations, with the help of THERMOCALC software, Version TCR, were carried out to identify compositions with a suitable melting behavior and phase formation. With the new alloys complete, epitaxial bridging of both gap shapes has been achieved within brazing times as short as 10 min.
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Research Papers
Fast Epitaxial High Temperature Brazing of Single Crystalline Nickel Based Superalloys
Britta Laux,
Britta Laux
Technische Universität Braunschweig,
e-mail: b.laux@tu-bs.de
Institut für Werkstoffe
, 38106 Braunschweig, Germany
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Sebastian Piegert,
Sebastian Piegert
Technische Universität Braunschweig,
Institut für Werkstoffe
, 38106 Braunschweig, Germany
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Joachim Rösler
Joachim Rösler
Technische Universität Braunschweig,
Institut für Werkstoffe
, 38106 Braunschweig, Germany
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Britta Laux
Technische Universität Braunschweig,
Institut für Werkstoffe
, 38106 Braunschweig, Germanye-mail: b.laux@tu-bs.de
Sebastian Piegert
Technische Universität Braunschweig,
Institut für Werkstoffe
, 38106 Braunschweig, Germany
Joachim Rösler
Technische Universität Braunschweig,
Institut für Werkstoffe
, 38106 Braunschweig, GermanyJ. Eng. Gas Turbines Power. May 2009, 131(3): 032102 (8 pages)
Published Online: February 11, 2009
Article history
Received:
April 16, 2008
Revised:
April 23, 2008
Published:
February 11, 2009
Citation
Laux, B., Piegert, S., and Rösler, J. (February 11, 2009). "Fast Epitaxial High Temperature Brazing of Single Crystalline Nickel Based Superalloys." ASME. J. Eng. Gas Turbines Power. May 2009; 131(3): 032102. https://doi.org/10.1115/1.3026576
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