强凤鸣,寇宏超,贾梦宇,等.β型γ-TiAl合金热变形过程中组织演化及动态再结晶行为研究现状[J].精密成形工程,2022,14(1):11-18.
QIANG Feng-ming,KOU Hong-chao,JIA Meng-yu,et al.Microstructure Evolution and Dynamic Recrystallization Behavior in β-Solidifying γ-TiAl during Thermomechanical Processing[J].Journal of Netshape Forming Engineering,2022,14(1):11-18. |
| β型γ-TiAl合金热变形过程中组织演化及动态再结晶行为研究现状 |
| Microstructure Evolution and Dynamic Recrystallization Behavior in β-Solidifying γ-TiAl during Thermomechanical Processing |
| 投稿时间：2021-12-09 |
| DOI：10.3969/j.issn.1674-6457.2022.01.002 |
| 中文关键词: TiAl合金 热机械加工 变形行为 再结晶 组织演化 |
| 英文关键词: TiAl alloys thermomechanical processing deformation behavior recrystallization microstructure evolution |
| 基金项目: |
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| 摘要点击次数: 1815 |
| 全文下载次数: 1069 |
| 中文摘要: |
| TiAl合金以其低密度、高比强和良好的抗蠕变性等优点，已在航空发动机上获得应用。先进的β型γ-TiAl合金通过引入一定量的β/B2相，显著改善了合金的热加工能力，该类合金更适合热机械加工。对β型γ-TiAl合金热机械加工过程中的组织演化和变形行为形成完整的认识是制定和优化热加工工艺的前提。综述了β型γ-TiAl合金的不同初始组织在热机械加工过程中的组织演变及其动态再结晶机制，指出当热加工温度低于Tγ,solv时，组织演化主要与(α/α2+γ)片层团的破碎有关;当热加工温度高于Tγ,solv时，主要与α相的动态再结晶有关，同时分析了β相的存在对(α/α2+γ)片层团以及α相动态再结晶的影响，最后对β型γ-TiAl合金热变形过程中的基础问题进行了总结和展望。 |
| 英文摘要: |
| Due to the low density, high specific strength and good creep resistance at high temperature, TiAl alloys have been successfully used in aero-engines. Through introduction of high content of β-stabilizing alloying elements, the advanced β-type γ-TiAl alloys possess improved thermal workability and are more suitable for thermomechanical processing. A thorough understanding of the microstructure evolution and deformation mechanism of the β-type γ-TiAl alloys during thermomechanical processing is the prerequisite for formulating and optimizing the processing parameters. Therefore, the microstructure evolution and dynamic recrystallization mechanism of β-type γ-TiAl alloys with different initial microstructures during thermomechanical processing were reviewed and discussed. It was pointed out that when the thermal processing temperature was lower than Tγ,solv, the microstructure evolution was mainly related to the fragmentation of the α2/γ lamellar colonies. When the thermal processing temperature was higher than Tγ,solv, the microstructure evolution was mainly related to the dynamic recrystallization of the α phase. Besides, the effects β phase on the α2/γ lamellar colonies and the dynamic recrystallization of the α phase were analyzed. The fundamental issues related to β-type γ-TiAl alloys during thermomechanical processing are summarized prospected. |
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