Microstructure and corrosion behaviour of TiC reinforced duplex stainless steels matrix composites sythesized by laser melt injection

Babatunde Obadele, Peter Olubambi, Oluwagbenga Johnson

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

Abstract

The microstructure and corrosion behaviour of titanium carbide (TiC) reinforced duplex stainless steel matrix surface composites synthesized by laser melt injection technique was investigated. The surface melting operation was conducted using a 4.4 kW CW Nd:YAG laser with laser power of 1.5 kW, scanning speed of 0.4 to 1.0 m/min, beam size of 3 mm and argon shield gas flow rate of 4 L/min. The morphologies and microstructures of the coatings examined using field emission gun scanning electron microscope (FEGSEM) revealed homogeneous distribution of fine precipitates of TiC in the matrix, while X-ray diffraction (XRD) analysis confirm no phase change. TiC addition to the steels significantly increased hardness value to about 547 Hv 0.1 but slightly decreased the corrosion resistance of the steels in 3.5% NaCl possibly due to the inter-granular carbide coating that prevented chromium from forming continuous passive oxide layers.

Original languageEnglish
Title of host publicationExtraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition
Pages33-40
Number of pages8
Publication statusPublished - May 15 2012
Externally publishedYes
Event2012 EPD Congress - TMS 2012 Annual Meeting and Exhibition - Orlando, FL, United States
Duration: Mar 11 2012Mar 15 2012

Publication series

NameTMS Annual Meeting

Conference

Conference2012 EPD Congress - TMS 2012 Annual Meeting and Exhibition
CountryUnited States
CityOrlando, FL
Period3/11/123/15/12

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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  • Cite this

    Obadele, B., Olubambi, P., & Johnson, O. (2012). Microstructure and corrosion behaviour of TiC reinforced duplex stainless steels matrix composites sythesized by laser melt injection. In Extraction and Processing Division - 2012 EPD Congress - Held During the TMS 2012 Annual Meeting and Exhibition (pp. 33-40). (TMS Annual Meeting).