放電等離子燒結TiAl基合金的顯微組織及力學性能

路新; 何新波; 李世瓊; 曲選輝

doi:10.13374/j.issn1001-053x.2008.03.010

放電等離子燒結TiAl基合金的顯微組織及力學性能

doi: 10.13374/j.issn1001-053x.2008.03.010

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 鋼鐵研究總院高溫材料研究所, 北京 100081;
3. 北京科技大學新金屬材料國家重點實驗室, 北京 100083

基金項目:

高等學校科技創新工程重大項目(No.704008)

新世紀優秀人才項目(No.NCET-04-01017)

詳細信息

作者簡介:
路新(1979-),女,博士研究生;曲選輝(1960-),男,教授,博士生導師

中圖分類號: TG146.2
計量
- 文章訪問數: 145
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- PDF下載量: 4
- 被引次數: 0
出版歷程
- 收稿日期: 2006-12-08
- 修回日期: 2007-01-14
- 網絡出版日期: 2021-08-06

Microstructures and mechanical properties of TiAl-based alloys by spark plasma sintering

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 10083, China;
2. High Temperature Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100083, China;
3. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 10083, China

摘要

摘要: 以Ti-47.5Al-2.5V-1.0Cr合金粉末為原料,采用放電等離子燒結工藝制備出TiAl基合金,并研究了制備工藝、顯微組織與室溫力學性能三者的關系.結果表明,采用放電等離子燒結方法可制備出致密度高、組織均勻的TiAl基合金.燒結溫度對合金的顯微組織影響顯著,且其室溫力學性能與顯微組織密切相關,顯微組織越細小,室溫強度和塑性越高.當燒結溫度為1100℃時,制備出的TiAl-V-Cr合金顯微組織類型為細小雙態組織,具有35.2%的壓縮率和3321MPa的斷裂強度,顯示出較好的室溫壓縮性能.
- TIAL基合金 /
- 放電等離子燒結 /
- 顯微組織 /
- 力學性能
Abstract: TiAl based alloys from the prealloyed powder of Ti-47.5Al-2.5V-1.0Cr were prepared by spark plasma sintering (SPS), and the relationship among sintering temperature, microstructure and mechanical properties was studied. The results showed that the TiAl based-alloy with high density and uniform microstructure could be obtained by SPS. In addition, the microstructure changed with sintering temperature, as a result, the mechanical properties changed with the microstructure. The finer the microstructure was, the higher the strength and ductility at room temperature became. For specimens sintered at 1100℃, the finer duplex microstructure was achieved. The specimens exhibited better compressive properties at room temperature with a compressive strength of 3 321 MPa and a compression ratio of 35.2%.
- TiAl based alloy /
- spark plasma sintering （SPS） /
- microstructure /
- mechanical properties