Surface hardening by in-situ grown composite layer on microalloyed steel employing TIG arcing process

Deepak Sharma, Prakriti Kumar Ghosh, Sudhir Kumar, Sourav Das, Ramkishor Anant, Nilesh Kumar

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Surface of microalloyed steel, hereafter referred as steel, has been modified by developing an in-situ grown composite case on its surface for improved hardness. It is done through surface melting by employing Tungsten Inert Gas (TIG) arcing. The hard reinforcements were made to grow in the surface matrix of steel through chemical reactions of the inorganic powders present in the applied coating and the molten base. The distribution and incorporation of these reinforcements were taken care by addition of Al and TiO2 in the coating. Three different mixtures, comprising different proportions of Al and TiO2, were prepared to develop a hybrid composite primarily containing Al2O3 and a small fraction of TiC along with other oxides as reinforcements. The modified particulate composite surface was analyzed under Vickers' micro-hardness tester confirming its significant improvement in hardness of the order of 1.88–2.24 times in comparison to that of the base metal, depending upon different chemistry of the powder mixture of the coating.

Original languageEnglish
Pages (from-to)144-158
Number of pages15
JournalSurface and Coatings Technology
Early online date6 Aug 2018
Publication statusPublished - 25 Oct 2018
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.


  • In-situ grown composite
  • Marangoni effect
  • Steel
  • Surface hardening
  • TIG arcing

ASJC Scopus subject areas

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


Dive into the research topics of 'Surface hardening by in-situ grown composite layer on microalloyed steel employing TIG arcing process'. Together they form a unique fingerprint.

Cite this