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

J. Singh, J. Mazumder

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

4 Scopus citations

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

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'IN-SITU FORMATION OF Ni-Cr-Al-R. E. ALLOY BY LASER CLADDING WITH MIXED POWDER FEED.'. Together they form a unique fingerprint.

  • 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.