Diffusion behavior at the interface of cladding steels

Masayuki Omichi, Masahide Sato, Tatsuya Tokunaga, Hiroshi Ohtani, Mitsuhiro Hasebe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Various cladding materials consisting of plain carbon steels with lower carbon concentrations and alloy steels with higher carbon concentrations have been considered to analyze the behavior of interdiffusion across the interface theoretically. The combination of the plain carbon steel and the alloy steel for the cladding was selected to make the chemical potential of carbon greater in the plain carbon steel than in the alloy steel. For the selection, the phase diagrams were computed with Thermo-Calc. The theoretical analysis was carried out using DICTRA that is the software developed at the Royal Institute of Technology in Sweden. The analysis indicates that the up-hill diffusion of carbon spontaneously occurs from the plain carbon steel to the alloy steel during annealing at elevated temperatures. For example, the cladding material composed of a plain carbon steel with a concentration of 0.046 mass%C and a 18Cr-8Ni stainless steel with a concentration of 0.06 mass%C exhibits such an up-hill diffusion at 1200 K, resulting in precipitation of Cr 23C 6 at the cladding interface.

Original languageEnglish
Pages (from-to)1013-1019
Number of pages7
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume68
Issue number12
DOIs
Publication statusPublished - 2004 Dec
Externally publishedYes

Keywords

  • Cladding steel
  • Diffusion controlled transformations
  • Up-hill diffusion

ASJC Scopus subject areas

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

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