This title appears in the Scientific Report :
2021
Please use the identifier:
http://dx.doi.org/10.1016/j.surfcoat.2020.126494 in citations.
Please use the identifier: http://hdl.handle.net/2128/26866 in citations.
Path to single-crystalline repair and manufacture of Ni-based superalloy using directional annealing
Path to single-crystalline repair and manufacture of Ni-based superalloy using directional annealing
Advanced methods for the repair of single-crystalline (SX) Ni-based superalloys are of special interest for the gas turbine industry. Polycrystalline repair approaches show promising results, while the repair of SX materials is still challenging. Directional annealing experiments resulted in large c...
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Personal Name(s): | Kalfhaus, T. |
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Schaar, H. (Corresponding author) / Thaler, F. / Ruttert, B. / Sebold, D. / Frenzel, J. / Steinbach, I. / Theisen, W. / Guillon, O. / Clyne, T. W. / Vassen, R. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEK-1 JARA-ENERGY; JARA-ENERGY |
Published in: | Surface and coatings technology, 405 (2021) S. 126494 - |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2021
|
DOI: |
10.1016/j.surfcoat.2020.126494 |
Document Type: |
Journal Article |
Research Program: |
Gas turbines Methods and Concepts for Material Development |
Link: |
Published on 2020-11-02. Available in OpenAccess from 2022-11-02. Restricted |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/26866 in citations.
Advanced methods for the repair of single-crystalline (SX) Ni-based superalloys are of special interest for the gas turbine industry. Polycrystalline repair approaches show promising results, while the repair of SX materials is still challenging. Directional annealing experiments resulted in large columnar grains by imposing thermal gradients at the abnormal grain growth temperature of a specific Ni-based superalloy. A numerical model of the Bridgman process is applied to provide an insight into the temperature evolution during zone annealing of the Vacuum-Plasma-Spray (VPS) repair coatings with the aim of promoting grain growth from the SX substrate. The results presented here suggest that this is a promising approach to repair or manufacture SX turbine blades. |