Influence of WC addition on microstructures of laser-melted Ni-based alloy coating

Y. M. Zhang, M. Hida, A. Sakakibara, Y. Takemoto

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Nickel-based alloy powder was surface melted on S45C steel substrate using a CO2 laser. The effect of tungsten carbide (WC) on the interface layer and microstructures in the laser melted layer has been investigated by x-ray diffraction (XRD) analysis, and by scanning and transmission electron microscopy (SEM and TEM) techniques. There are three zones in the laser melted layer: the alloyed zone, the interface zone, and the heat affected zone of substrate. The interface zone appears as a smooth bright layer of single γ-(Fe, Ni) phase that serves as a primary crystallization phase in the laser alloyed zone. K-S lattice correspondence was recognized between γ-(Fe, Ni) in the interface and martensite in the substrate. The size of dendritic crystals decreased and eutectic structures in the laser alloyed layer changed after the addition of WC.

Original languageEnglish
Pages (from-to)667-674
Number of pages8
JournalJournal of Materials Engineering and Performance
Volume11
Issue number6
DOIs
Publication statusPublished - Dec 1 2002

Keywords

  • Electron microscope
  • Interface
  • Laser-alloyed layer
  • NiCrBSi
  • Transmission
  • WC

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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