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Texture modification, grain refinement and improved hardness/corrosion balance of a FeAl alloy by pulsed electron beam surface treatment in the “heating mode”

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
58
Issue
12
Identifiers
DOI: 10.1016/j.scriptamat.2008.01.052
Keywords
  • Electron Beam Methods
  • Iron Aluminides
  • Texture
  • Grain Refining
  • Corrosion

Abstract

It is demonstrated that significant surface modifications can be generated by low-energy, high-current pulsed electron beam treatments in the “heating mode” (which does not melt the surface). The extremely fast thermomechanical cycles generate grain refinement and texture modification at the surface of a Fe–40 at.% Al alloy. Together with the formation of vacancies, this accounts for a significant increase in the surface microhardness. Nevertheless, because of the absence of craters with the heating mode, the corrosion resistance was unchanged.

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