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| TiAl合金片层形成及其稳定性研究现状 |
| Research Status of Lamellar Formation and Its Stability in TiAl Alloys |
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| DOI：10.3969/j.issn.1674-6457.2022.11.007 |
| 中文关键词: TiAl合金 片层形成 变体选择 稳定性 片层特征 |
| 英文关键词: TiAl alloys lamellar formation variant selection stability lamellar characteristics |
| 基金项目: |
| Author Name | Affiliation | | YU Yong-hao | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China | | KOU Hong-chao | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China | | WANG Ya-rong | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China | | LI Yu-qing | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China | | LI Jin-shan | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China |
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| 中文摘要: |
| TiAl合金具有低密度和优异的高温性能，是650~850 ℃温度区间内替代镍基高温合金的重要候选材料。具有片层组织的TiAl合金高温综合性能优异，但片层组织形成机理、高温服役条件下片层稳定性仍是关注的重点。综述了近年来片层形成和组织稳定性的研究成果，主要分析片层形成机制和γ变体选择机制，以及片层特征对组织稳定性的影响，并对未来的研究方向进行了展望。 |
| 英文摘要: |
| Due to the low density and excellent high-temperature properties, TiAl alloys are important candidate replacements for Ni-based superalloys at 650-850 ℃. TiAl alloys containing lamellar microstructure exhibit excellent high-temperature properties, but the formation mechanism of lamellar microstructure and lamellar stability under elevated temperature service conditions remain a focus of interest. This paper reviews the recent research results on lamellar formation and microstructural stability, mainly analyzes the lamellar formation mechanism and variant selection of γ phase, as well as the influence of lamellar characteristics on the microstructural stability. Finally, the future research directions are also prospected. |
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