| 激光喷丸Ti17叶片前缘的抗FOD性能模拟研究 |
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| 引用本文： | 吴俊峰,邹世坤,张永康,孙桂芳,倪中华,车志刚,曹子文. 激光喷丸Ti17叶片前缘的抗FOD性能模拟研究[J]. 稀有金属材料与工程, 2018, 47(11): 3359-3364 |
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| 作者姓名： | 吴俊峰 邹世坤 张永康 孙桂芳 倪中华 车志刚 曹子文 |
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| 作者单位： | 东南大学机械工程学院;北京航空制造工程研究所,北京航空制造工程研究所,广东工业大学机电工程学院,东南大学机械工程学院,东南大学机械工程学院,北京航空制造工程研究所,北京航空制造工程研究所 |
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| 基金项目： | 国家科技重大专项(No. 2016YFB1102705), 装备预研教育部联合基金(No. 6141A02033103),国家博士后基金 (No. 2015M570395, 2016T90400), 江苏省产学研前瞻性研究项目(No. BY2015070-05), 江苏省博士后基金(No. 1501028A),江苏省六大人才高峰高层次人才项目(2016?HKHT-001) |
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| 摘 要： | 为研究激光冲击强化（LSP）叶片前缘抗外物损伤（FOD）性能，设计截面尺寸近似叶片前缘的缺口模拟件，采用YAG激光器（30 J和15 ns）和方形光斑（4 mm×4 mm）对TC17模拟件的缺口尖端进行双面LSP。采用X射线衍射仪、透射电镜、高频疲劳试验机和扫描电镜分别对LSP前后的残余应力、微观组织、疲劳性能和疲劳断口进行测试分析。与未强化缺口模拟件相比，LSP-TC17合金的表面残余压应力最大值为-403 MPa。LSP-TC17合金表面形成高密度位错、孪晶和纳米晶。LSP-TC17缺口模拟件的疲劳强度提高55.6 %。TC17缺口模拟件的疲劳强化机理为高幅残余压应力和表面纳米晶。研究结果为LSP-FOD叶片奠定理论基础并提供工艺参考。
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| 关 键 词： | 激光冲击强化 TC17合金 抗FOD性能 残余应力 纳米晶 |
| 收稿时间： | 2017-03-15 |
| 修稿时间： | 2017-08-03 |
Simulation on the FOD Resistance at the Leading Edge of Ti17 Blade with Laser Peening |
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| Wu Junfeng,Zou Shikun,Zhang Yongkang,Sun Guifang,Ni Zhonghu,Che Zhigang and Cao Ziwen. Simulation on the FOD Resistance at the Leading Edge of Ti17 Blade with Laser Peening[J]. Rare Metal Materials and Engineering, 2018, 47(11): 3359-3364 |
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| Authors: | Wu Junfeng Zou Shikun Zhang Yongkang Sun Guifang Ni Zhonghu Che Zhigang Cao Ziwen |
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| Affiliation: | School of Mechanical Engineering,Southeast University,Nanjing,Jiangsu,,School of Electro-mechanical Engineering,Guangdong University of Technology,Guangzhou,Guangdong,School of Mechanical Engineering,Southeast University,Nanjing,Jiangsu,School of Mechanical Engineering,Southeast University,Nanjing,Jiangsu,, |
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| Abstract: | Notched fatigue samples were designed to approximate a typical leading edge of the blade with foreign object damage (FOD) in order to study the anti-fatigue performance of FOD-blades with laser shock processing (LSP). The surface at the crack tip of the notches of TC17 fatigue samples was LSPed with double sides. A YAG laser system was used with laser energy of 30 J, pulse width of 15 ns and square spot of 4 mm×4 mm. The residual stress, microstructure, fatigue performance and fatigue fracture of samples with and without LSP were measured and analyzed by X-ray diffractometer, Transmission Electron Microscope (TEM), high-frequency fatigue tester and Scanning Electron Microscope (SEM). Compared with the notched fatigue samples without LSP, the surface residual stresses of LSP-TC17 alloy increased to -445MPa. High density dislocation, twin and nanocrystallite were formed in the surface. The fatigue strength of LSP-TC17 notched fatigue samples increased by 55.6%. Fatigue strengthening mechanism of TC17 notched fatigue samples was high amplitude compressive residual stress and surface nanocrystallite. The experiment results lay the theoretical foundation and provide the technological reference for LSP-FOD blades. |
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| Keywords: | laser shock processing TC17 alloy FOD resistance residual stress nanocrystallite |
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