Phase transformations in Fe1-2xAlxVx (x≤0.15) alloys

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Colleges, School and Institutes


Iron rich Fe-Al-V alloys have a considerable potential as structural materials at high temperatures. In previous works we have studied the phase equilibria in the bcc system Fe-Al-V, from computational thermodynamics calculations. There, the vertical section Fe1-2XAlXVX was defined as the best candidate to design alloys with technological application, due to its wide (A2+L21) two-phase field. In this paper, experimental techniques of Differential Scanning Calorimetry (DSC) and Transmission Electron Microscopy (TEM) are used to find the phase equilibria in Fe1-2XAlXVX section up to 1100 °C and X≤0.15. The A2/B2 order-disorder transformation was confirmed, the limits of two-phase fields (A2+L21) and (L21+B2) with L21 as coherent precipitate were established, and evidence of a small (A2+B2) field previously unknown was found. The experimental assessment of these phase equilibria opens the way to the design of these alloys and their possible heat treatments.


Original languageEnglish
Pages (from-to)994-103
Number of pages10
JournalProcedia Materials Science
Publication statusPublished - 2 Jul 2015