Effect of heat treatment on microstructure of Cr-Ni-Fe coatings prepared by electrodeposition

M. El-Sharif, X. Wang, C. U. Chisholm, A. Waston, A. Vertes, E. Kuzmann

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

The Cr-Ni-Fe alloy coatings examined in this paper were obtained from DMF and urea based electrolytes using a new electrodeposition process developed by some of the present authors. This process gives sustained deposition of thick coatings of Cr-Ni-Fe alloys of constant composition. The as-deposited, metallographically polished and properly etched Cr-Ni-Fe alloys exhibited a laminar structure runs parallel to the substrate surface. The possible causes of the formation of the laminated structure are discussed in the context of the authors' work. Component analyses were performed using Carlo ERRA 1106 Analyser, the as-deposited coatings contained considerable amount of carbon and some nitrogen. Microhardness of electrodeposits obtained from the DMF based electrolyte greatly increased after heat treatment at 400 to 800°C. The microhardness of electrodeposit obtained from the urea based electrolyte steadily increased after heat treatment to 600°C and then decreased dramatically. Mossbauer spectrocopy and x-ray diffractometry show that as-deposited Cr-Ni-Fe alloy is a multiphase material. Phase transformation and precipitation process takes place in the electrodeposits, due to the heat treatment.

Original languageEnglish
Pages (from-to)633-638
Number of pages6
JournalMaterials Science Forum
Volume163-6
Issue numberpt 2
Publication statusPublished - Dec 1 1994
EventProceedings of the 2nd ASM Heat Treatment and Surface Engineering Conference. Part 1 (of 2) - Dortmund, Ger
Duration: Jun 1 1993Jun 3 1993

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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