A New Mechanism of Dynamic Phase Transformations in An Isothermal Forged Beta–Gamma Intermetallic Alloy
oleh: Zhengang Zhang, Shoujiang Qu, Guorong Cui, Aihan Feng, Jun Shen, Daolun Chen
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2019-08-01 |
Deskripsi
A new mechanism of dynamic phase transformations of α<sub>2</sub> ↔ γ in an isothermally forged γ-TiAl-based alloy that occur simultaneously during a short-term exposure at 1000 °C is identified in this study. In the heating process, γ phase significantly decreases through a phase transformation of γ → α<sub>2</sub>, while new γ lamellae are precipitated in the interior of equiaxed grains of α<sub>2</sub> phase through a phase transformation of α<sub>2</sub> → γ. The reasons for the presence of these two inverse phase transformations α<sub>2</sub> ↔ γ occurring simultaneously are discussed.