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

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Colleges, School and Institutes

Abstract

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.

Details

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