Reactive gas shielding during laser surface alloying for production of hard coatings

S. S. Babu, S. M. Kelly, M. Murugananth, R. P. Martukanitz

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The effects of nitrogen addition to shielding gas during laser surface alloying with a mixture of 80 wt.% 431-type stainless steel and 20 wt.% titanium carbide powders were investigated. Microstructural characterization of the laser deposits indicated that titanium carbide melted and re-precipitated as fine carbides from the liquid melt during cooling. With 100% nitrogen shielding and the same powder mixtures, a deposition with increased hardness was obtained. The microstructural evolution in the deposit was calculated with equilibrium thermodynamic calculations.

Original languageEnglish (US)
Pages (from-to)2663-2671
Number of pages9
JournalSurface and Coatings Technology
Volume200
Issue number8
DOIs
StatePublished - Jan 24 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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