Formation of (B2+D03) two-phase microstructure in a Fe-23 Al-7 Ti alloy

Abstract

As-quenched microstructure of the Fe-23 at% Al-7 at% Ti alloy was a mixture of (A2+D03) phases. When the as-quenched alloy was aged at 1073 K for moderate times, D03 domains grew preferentially along 〈100〉 directions and extremely fine B2 particles occurred at a/2 〈100〉 anti-phase boundaries (APBs). After prolonged aging at 1073 K, the B2 particles would grow to occupy the whole a/2〈100〉 APBs. Consequently, the stable microstructure of thr alloy at 1073 K was a mixture of (B2+D03) phases. © 2007 The Japan Institute of Metals.