Single-crystal height extension by Laser Metal Deposition of CMSX-4

Research output: Contribution to journal › Conference article › Research › peer review

Authors

  • I. Buchbender
  • C. Hoff
  • J. Hermsdorf
  • V. Wesling
  • S. Kaierle

External Research Organisations

  • Laser Zentrum Hannover e.V. (LZH)
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Details

Original languageEnglish
Pages (from-to)304-309
Number of pages6
JournalProcedia CIRP
Volume94
Early online date15 Sept 2020
Publication statusPublished - 2020
Externally publishedYes

Abstract

The introduction of directionally solidified and single-crystal nickel-based superalloys have led to a higher thermal efficiency of engines by allowing for an increase in turbine inlet temperatures from 1000°C to 1400°C. These temperatures however lead to higher thermal stress and corrosive environments, resulting in a shorter life span. Previous work has shown the applicability of laser metal deposition (LMD) for the regeneration of these high value components, while maintaining primary crystalline orientation of single-crystal high pressure turbine blades. However, the processing of these materials by LMD poses several challenges, such as susceptibility to cracking, the formation of misoriented grains and low weldability. This paper examines deposition strategies to extend single-crystal height. While a continuous, meandering strategy shows the most promising percentage single-crystallinity results, an additional remelting step increases epitaxial deposition height. Apart from percentage single-crystallinity and deposition height, this study quantifies the effect of these strategies on cracking and the formation of misorientations.

Keywords

    Laser cladding, Single-crystal, Superalloys

ASJC Scopus subject areas

Cite this

Single-crystal height extension by Laser Metal Deposition of CMSX-4. / Buchbender, I.; Hoff, C.; Hermsdorf, J. et al.
In: Procedia CIRP, Vol. 94, 2020, p. 304-309.

Research output: Contribution to journal › Conference article › Research › peer review

Buchbender, I, Hoff, C, Hermsdorf, J, Wesling, V & Kaierle, S 2020, 'Single-crystal height extension by Laser Metal Deposition of CMSX-4', Procedia CIRP, vol. 94, pp. 304-309. https://doi.org/10.1016/j.procir.2020.09.057
Buchbender, I., Hoff, C., Hermsdorf, J., Wesling, V., & Kaierle, S. (2020). Single-crystal height extension by Laser Metal Deposition of CMSX-4. Procedia CIRP, 94, 304-309. https://doi.org/10.1016/j.procir.2020.09.057
Buchbender I, Hoff C, Hermsdorf J, Wesling V, Kaierle S. Single-crystal height extension by Laser Metal Deposition of CMSX-4. Procedia CIRP. 2020;94:304-309. Epub 2020 Sept 15. doi: 10.1016/j.procir.2020.09.057
Buchbender, I. ; Hoff, C. ; Hermsdorf, J. et al. / Single-crystal height extension by Laser Metal Deposition of CMSX-4. In: Procedia CIRP. 2020 ; Vol. 94. pp. 304-309.
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abstract = "The introduction of directionally solidified and single-crystal nickel-based superalloys have led to a higher thermal efficiency of engines by allowing for an increase in turbine inlet temperatures from 1000°C to 1400°C. These temperatures however lead to higher thermal stress and corrosive environments, resulting in a shorter life span. Previous work has shown the applicability of laser metal deposition (LMD) for the regeneration of these high value components, while maintaining primary crystalline orientation of single-crystal high pressure turbine blades. However, the processing of these materials by LMD poses several challenges, such as susceptibility to cracking, the formation of misoriented grains and low weldability. This paper examines deposition strategies to extend single-crystal height. While a continuous, meandering strategy shows the most promising percentage single-crystallinity results, an additional remelting step increases epitaxial deposition height. Apart from percentage single-crystallinity and deposition height, this study quantifies the effect of these strategies on cracking and the formation of misorientations.",
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AU - Buchbender, I.

AU - Hoff, C.

AU - Hermsdorf, J.

AU - Wesling, V.

AU - Kaierle, S.

N1 - Funding information: This project is funded by the Forschungsgemeinschaft (DFG, German Foundation) – SFB 871/3 – 119193472.

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N2 - The introduction of directionally solidified and single-crystal nickel-based superalloys have led to a higher thermal efficiency of engines by allowing for an increase in turbine inlet temperatures from 1000°C to 1400°C. These temperatures however lead to higher thermal stress and corrosive environments, resulting in a shorter life span. Previous work has shown the applicability of laser metal deposition (LMD) for the regeneration of these high value components, while maintaining primary crystalline orientation of single-crystal high pressure turbine blades. However, the processing of these materials by LMD poses several challenges, such as susceptibility to cracking, the formation of misoriented grains and low weldability. This paper examines deposition strategies to extend single-crystal height. While a continuous, meandering strategy shows the most promising percentage single-crystallinity results, an additional remelting step increases epitaxial deposition height. Apart from percentage single-crystallinity and deposition height, this study quantifies the effect of these strategies on cracking and the formation of misorientations.

AB - The introduction of directionally solidified and single-crystal nickel-based superalloys have led to a higher thermal efficiency of engines by allowing for an increase in turbine inlet temperatures from 1000°C to 1400°C. These temperatures however lead to higher thermal stress and corrosive environments, resulting in a shorter life span. Previous work has shown the applicability of laser metal deposition (LMD) for the regeneration of these high value components, while maintaining primary crystalline orientation of single-crystal high pressure turbine blades. However, the processing of these materials by LMD poses several challenges, such as susceptibility to cracking, the formation of misoriented grains and low weldability. This paper examines deposition strategies to extend single-crystal height. While a continuous, meandering strategy shows the most promising percentage single-crystallinity results, an additional remelting step increases epitaxial deposition height. Apart from percentage single-crystallinity and deposition height, this study quantifies the effect of these strategies on cracking and the formation of misorientations.

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