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

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

    研究成果: Article査読

    12 被引用数 (Scopus)

    抄録

    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.

    本文言語English
    ページ(範囲)722-726
    ページ数5
    ジャーナルIntermetallics
    15
    5-6
    DOI
    出版ステータスPublished - 2007 5月

    ASJC Scopus subject areas

    • 化学 (全般)
    • 材料力学
    • 機械工学
    • 金属および合金
    • 材料化学

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