Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7951956 | Journal of Materials Science & Technology | 2018 | 27 Pages |
Abstract
In order to understand the effect of Mo alloying on the microstructural evolution of TiAl alloy, the as-cast microstructure, heat treated microstructure characteristic, and hot compression microstructure evolution of Ti-44Al alloy have been studied in this work. The as-cast microstructure morphology changes from (γ+α2) lamellar colony and β/β0 + γ mixture structure to β/β0 phase matrix widmannstatten structure, when Mo content increases from 2 at.% to 6 at.%. Affected by the relationship between β phase and α phase, the angles between the lamellar orientation and the block β/β0 phase are roughly at 0°, 45° and 90°. Comparing with heat treatment microstructure, the hot compression microstructure contains less β/β0 phase, however, the β/β0 phase containing 2Mo alloy and 3Mo alloy hot compressed at 1275 °C has the inverse tendency. In addition, (α2 + γ) colony is decomposed by the discontinuous transformation.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Chemistry
Authors
S.Z. Zhang, Z.W. Song, J.C. Han, C.J. Zhang, P. Lin, D.D. Zhu, F.T. Kong, Y.Y. Chen,