Strengthening of iron aluminide alloys by atomic ordering and Laves phase precipitation for high-temperature applications

D. D. Risanti*, G. Sauthoff

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

The ternary system Fe-Al-Ta allows the formation of the hard and brittle ternary Laves phase Ta(Fe0.5+x,Al0.5-x)2 with hexagonal C14 structure. The present study concentrates on Fe-Al-Ta alloys with small Ta contents between 2 and 6 at.% and various Al contents between 0 and 45 at.%. The phase equilibria in the ternary Fe-Al-Ta system at 1000°C are studied experimentally for determination of the solubility limits of Ta in iron aluminide matrices and types of phases and structures which may occur at high temperatures. It is observed that small amounts of Laves phase together with atomic ordering increase the yield stress and affect ductility in a complex way.

Original languageEnglish
Pages (from-to)1313-1321
Number of pages9
JournalIntermetallics
Volume13
Issue number12
DOIs
Publication statusPublished - Dec 2005
Externally publishedYes

Keywords

  • A. Iron aluminides (based on FeAl)
  • A. Iron aluminides (based on FeAl)
  • B. Brittleness and ductility
  • B. Mechanical properties at high temperatures

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