Details
| Original language | English |
|---|---|
| Pages (from-to) | 233-236 |
| Number of pages | 4 |
| Journal | Procedia CIRP |
| Volume | 111 |
| Early online date | 6 Sept 2022 |
| Publication status | Published - 2022 |
| Event | 12th CIRP Conference on Photonic Technologies, LANE 2022 - Erlangen, Germany Duration: 4 Sept 2022 → 8 Sept 2022 |
Abstract
Single-Crystal (SX-) turbine blades are made of Ni-based superalloys for high-pressure stages of aircraft-turbines. During operation, turbine blades are subject of wear. Typical defects are cracks at the tip of blades. Conventional tip-repairs use welding materials with differing composition, which lead to local loss of SX-microstructure and impair the following service life. This work considers blades in flight condition with tips partially removed and conventionally repaired as the initial condition. The SX-repair follows a two-step strategy for the powder based DED-LB/M process. A powder welding material 'PWA 1484' is used, which is identical to investigated blades material. Laser powers of 120-160 W and powder feed rates of 1-4 g/min are subject of parameter investigations. The results show that conventionally repaired areas affect the buildup and a SX-microstructure negatively. In contrast, successful tip-repairs with SX-microstructures of up to 94.85 % and a maximum build-up of 2.3 mm are possible.
Keywords
- Additive manufacturing, laser powder direct energy deposition, single-crystal microstructure, single-crystal repair, single-crystal turbine blades
ASJC Scopus subject areas
- Engineering(all)
- Control and Systems Engineering
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Procedia CIRP, Vol. 111, 2022, p. 233-236.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Single-crystal repair of high-pressure single-crystal turbine blades for industrial conditions
AU - Sayilgan, Vurgun
AU - Reker, Dirk
AU - Bernhard, Robert
AU - Hermsdorf, Jörg
AU - Kaierle, Stefan
N1 - Funding Information: This project is funded by the Deutsche Forschungsge-meinschaft (DFG, German Research Foundation) – SFB 871/3 – 119193472 within the scope of transfer project T5. The authors thank the DFG for their support.
PY - 2022
Y1 - 2022
N2 - Single-Crystal (SX-) turbine blades are made of Ni-based superalloys for high-pressure stages of aircraft-turbines. During operation, turbine blades are subject of wear. Typical defects are cracks at the tip of blades. Conventional tip-repairs use welding materials with differing composition, which lead to local loss of SX-microstructure and impair the following service life. This work considers blades in flight condition with tips partially removed and conventionally repaired as the initial condition. The SX-repair follows a two-step strategy for the powder based DED-LB/M process. A powder welding material 'PWA 1484' is used, which is identical to investigated blades material. Laser powers of 120-160 W and powder feed rates of 1-4 g/min are subject of parameter investigations. The results show that conventionally repaired areas affect the buildup and a SX-microstructure negatively. In contrast, successful tip-repairs with SX-microstructures of up to 94.85 % and a maximum build-up of 2.3 mm are possible.
AB - Single-Crystal (SX-) turbine blades are made of Ni-based superalloys for high-pressure stages of aircraft-turbines. During operation, turbine blades are subject of wear. Typical defects are cracks at the tip of blades. Conventional tip-repairs use welding materials with differing composition, which lead to local loss of SX-microstructure and impair the following service life. This work considers blades in flight condition with tips partially removed and conventionally repaired as the initial condition. The SX-repair follows a two-step strategy for the powder based DED-LB/M process. A powder welding material 'PWA 1484' is used, which is identical to investigated blades material. Laser powers of 120-160 W and powder feed rates of 1-4 g/min are subject of parameter investigations. The results show that conventionally repaired areas affect the buildup and a SX-microstructure negatively. In contrast, successful tip-repairs with SX-microstructures of up to 94.85 % and a maximum build-up of 2.3 mm are possible.
KW - Additive manufacturing
KW - laser powder direct energy deposition
KW - single-crystal microstructure
KW - single-crystal repair
KW - single-crystal turbine blades
UR - http://www.scopus.com/inward/record.url?scp=85141898457&partnerID=8YFLogxK
U2 - 10.1016/j.procir.2022.08.056
DO - 10.1016/j.procir.2022.08.056
M3 - Conference article
AN - SCOPUS:85141898457
VL - 111
SP - 233
EP - 236
JO - Procedia CIRP
JF - Procedia CIRP
SN - 2212-8271
T2 - 12th CIRP Conference on Photonic Technologies, LANE 2022
Y2 - 4 September 2022 through 8 September 2022
ER -