IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED.

Jogender Singh, J. Mazumder

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Oxidation resistant materials for service at elevated temperatures must satisfy two requirements: diffusion through oxide scale must occur at the lowest possible rate and oxide scale must resist spallation. The formation of an Al//2O//3 protective scale fulfills the former requirements but its adherence is poor. Rare earths such as Y or Hf are added to improve adhesion. In this paper, in situ Ni-Cr-Al-Hf alloy has been developed by laser surface cladding with mixed powder feed. A 10 kW CO//2 laser was used for laser cladding. Optical, SEM, and STEM microanalysis techniques were employed to characterize the different phases produced during laser cladding process. Microstructural studies showed a high degree of grain refinement, increased solid solubility of Hf in matrix and Hf rich precipitates. The paper deals with the microstructural development during laser cladding process.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
EditorsA. Quenzer
PublisherSpringer Verlag
Pages169-179
Number of pages11
ISBN (Print)0387163263
StatePublished - Dec 1 1986

Fingerprint

Laser cladding
Powders
Oxides
Lasers
Grain refinement
Microanalysis
Rare earths
Precipitates
Adhesion
Solubility
Oxidation
Scanning electron microscopy
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Singh, J., & Mazumder, J. (1986). IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED. In A. Quenzer (Ed.), Unknown Host Publication Title (pp. 169-179). Springer Verlag.
Singh, Jogender ; Mazumder, J. / IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED. Unknown Host Publication Title. editor / A. Quenzer. Springer Verlag, 1986. pp. 169-179
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abstract = "Oxidation resistant materials for service at elevated temperatures must satisfy two requirements: diffusion through oxide scale must occur at the lowest possible rate and oxide scale must resist spallation. The formation of an Al//2O//3 protective scale fulfills the former requirements but its adherence is poor. Rare earths such as Y or Hf are added to improve adhesion. In this paper, in situ Ni-Cr-Al-Hf alloy has been developed by laser surface cladding with mixed powder feed. A 10 kW CO//2 laser was used for laser cladding. Optical, SEM, and STEM microanalysis techniques were employed to characterize the different phases produced during laser cladding process. Microstructural studies showed a high degree of grain refinement, increased solid solubility of Hf in matrix and Hf rich precipitates. The paper deals with the microstructural development during laser cladding process.",
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Singh, J & Mazumder, J 1986, IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED. in A Quenzer (ed.), Unknown Host Publication Title. Springer Verlag, pp. 169-179.

IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED. / Singh, Jogender; Mazumder, J.

Unknown Host Publication Title. ed. / A. Quenzer. Springer Verlag, 1986. p. 169-179.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Oxidation resistant materials for service at elevated temperatures must satisfy two requirements: diffusion through oxide scale must occur at the lowest possible rate and oxide scale must resist spallation. The formation of an Al//2O//3 protective scale fulfills the former requirements but its adherence is poor. Rare earths such as Y or Hf are added to improve adhesion. In this paper, in situ Ni-Cr-Al-Hf alloy has been developed by laser surface cladding with mixed powder feed. A 10 kW CO//2 laser was used for laser cladding. Optical, SEM, and STEM microanalysis techniques were employed to characterize the different phases produced during laser cladding process. Microstructural studies showed a high degree of grain refinement, increased solid solubility of Hf in matrix and Hf rich precipitates. The paper deals with the microstructural development during laser cladding process.

AB - Oxidation resistant materials for service at elevated temperatures must satisfy two requirements: diffusion through oxide scale must occur at the lowest possible rate and oxide scale must resist spallation. The formation of an Al//2O//3 protective scale fulfills the former requirements but its adherence is poor. Rare earths such as Y or Hf are added to improve adhesion. In this paper, in situ Ni-Cr-Al-Hf alloy has been developed by laser surface cladding with mixed powder feed. A 10 kW CO//2 laser was used for laser cladding. Optical, SEM, and STEM microanalysis techniques were employed to characterize the different phases produced during laser cladding process. Microstructural studies showed a high degree of grain refinement, increased solid solubility of Hf in matrix and Hf rich precipitates. The paper deals with the microstructural development during laser cladding process.

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Singh J, Mazumder J. IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED. In Quenzer A, editor, Unknown Host Publication Title. Springer Verlag. 1986. p. 169-179