Role of preplaced silicon on a TIG processed SiC incorporated microalloyed steel

Thomas Neville Baker*, Patricia Muñoz-de Escalona, Maider Olasolo, Tiziana Marrocco, James Kelly, Bingquiang Wei, Kejian He, Shahajahan Mridha

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
34 Downloads (Pure)


Research aimed at enhancing the surface properties of carbon steels by incorporating fine silicon carbide particulates has had limited success because the dissolution of the ceramic occurred. This research considers a method of reducing SiC dissolution by generating a high Fe–Si liquid which protects the ceramic. Three particulate groups were investigated, (1) ∼ 5 µm SiC, (2) ∼45 µm Si +∼ 5 µm SiC, and (3) ∼45 µm Si, all incorporated into a microalloyed steel using a tungsten inert gas process. Detailed microhardness of the melt zones together with microstructural analysis showed that the addition of Si resulted in a cracked hard layer containing SiC. However, in Specimen 1, a thicker, hardcrack-free layer resulted from the microstructure developed by the dissolution of SiC.

Original languageEnglish
Pages (from-to)1349-1363
Number of pages15
JournalMaterials Science and Technology
Issue number12
Early online date25 Jun 2020
Publication statusPublished - 1 Dec 2020


  • microalloyed steel
  • microhardness
  • SEM
  • silicon carbide and silicon particulates
  • Surface engineering
  • TIG melting
  • XRD


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