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Start Over Author "Cui, Y.Y." Journal intermetallics
8 results on '"Cui, Y.Y."'

8. Deformation-induced γ↔α2 phase transformation in TiAl alloy compressed at room temperature

Author

Chen, C.L., Lu, W., Cui, Y.Y., He, L.L., and Ye, H.Q.

Subjects
*ALLOYS, *TRANSMISSION electron microscopy, *PHASE transitions, *DEFORMATIONS (Mechanics), *NUCLEATION, *METALLURGY
Abstract

Abstract: Deformation-induced γ↔α2 phase transformation in a Ti–47Al–2Cr–2Nb–0.2Y (at.%) alloy compressed at room temperature was investigated by high-resolution transmission electron microscopy (HREM) and energy dispersive spectrum (EDS). The deformation-induced (DI) γ→α2 phase transformation occurred in a twin intersection region. On the other hand, the deformation-induced α2 →γ transformation nucleated at the stacking faults of α2 phase. The composition analysis of the γ and α2 laths by EDS suggested that composition of some laths deviated much from their equilibrium values. These composition deviations promoted the deformation-induced γ↔α2 phase transformation to occur; EDS results also suggested that there was no composition difference between the DI-γ plate and the primary γ phase. Based on the HREM and EDS experimental results, the mechanism of the deformation-induced γ↔α2 phase transformation has been discussed. [Copyright &y& Elsevier]

Published
2007
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