Mechanical properties of rapidly solidified Fe-Al-B ternary alloys

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Abstract

In this work, the influence of Al and B concentration on the constituent phases and the mechanical properties of Fe100-x-yAlxB y (0 < x ≤ 35, 0 < y ≤ 25, and x + y ≤ 50) ternary alloys produced by copper mould casting was investigated. In this composition range, the rapidly solidified alloys contain two crystalline phases: α-Fe(Al) solid solution and Fe2B compound. Contour maps of compressive strength (σc) and fracture strain (εf) are plotted according to the quasi-static compression test results of the as-cast Fe-Al-B rods. These rapidly solidified Fe-Al-B crystalline alloys, such as Fe55Al30B15 as a typical sample, can show an ultra-high σc up to ∼3 GPa and a certain plasticity (∼5%). The formation of ultrafine eutectics and solid-solution strengthening of Al substitutional solution in α-Fe are considered to be responsible for the considerable improvement of strength.

Original languageEnglish
Pages (from-to)S472-S475
JournalJournal of Alloys and Compounds
Volume504
Issue numberSUPPL. 1
DOIs
StatePublished - Aug 2010

Keywords

  • Mechanical properties
  • Rapid solidification
  • Transition metal alloys and compounds
  • X-ray diffraction

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