Precipitation sequences during carburisation of Cr-Mo steel

J. M. Race, H. K. D. H. Bhadeshia

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

When Cr–Mo steel is joined to mild steel and the joint held at an elevated temperature the carbon tends to migrate from the mild steel to the Cr–Mo alloy. This migration is driven by the higher chemical potential of carbon in the mild steel, and leads to a steady accumulation of carbon in the Cr–Mo steel at the weld junction. The present work demonstrates that the carbon enrichment has a strong effect on the sequence of carbides that forms during aging, and the results are rationalised using thermodynamic phase stability calculations. Similar data are reported for other dissimilar metal joints.
Original languageEnglish
Pages (from-to)875-882
Number of pages8
JournalMaterials Science and Technology
Volume8
Issue number10
DOIs
Publication statusPublished - 1 Oct 1992

Keywords

  • steel
  • carbon enrichment
  • carbides
  • metal joints

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