Influence of Gas Composition and Exposure Cycle on the Formation of Surface and Subsurface Oxides in Iron-Aluminum-Based Alloys at High Temperatures

June H. Bott, Hogbin Yin, Seetharaman Sridhar, Michael Auinger

Research output: Contribution to journalArticlepeer-review

Abstract

The slab reheating process of binary iron-aluminum alloys and an industrial TRIP steel grade has been investigated in both dry and wet atmospheres. The presence of water vapor has a significant effect on the overall scale growth and internal corrosion depth. Heating rate greatly influences the porosity of the surface oxide layer with the surface getting more porous at faster heating rates. Nitride formation could be suppressed in the presence of water vapor, leading to a reduction of internal corrosion depth and a better formability of the final material. Experimental results were compared to thermodynamic predictions and critically discussed.

Original languageEnglish (US)
Pages (from-to)2157-2163
Number of pages7
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume47
Issue number4
DOIs
StatePublished - Aug 1 2016
Externally publishedYes

ASJC Scopus subject areas

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

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