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| Research on SPF/DB Process and Properties of Titanium Alloy Hollow Lattice |
| ZHAO Bing1, 2, 3, YANG Yi4, LI Zhiqiang1, 2, 3, MU Yanhong1, 2, 3, LIU Shengjing1, 2, 3, ZHANG Bin1, ZHANG Chao1, SUN Chaoyang5, LIU Yang5, WANG Xinzhu6, CHU Xingrong7, HAN Shu7 |
1. AVIC Manufacturing Technology Institute, Beijing 100024, China;
2. Aviation Key Laboratory of Science and Technology on Plastic Forming, Beijing 100024, China;
3. Beijing Key Laboratory on Digital Plastic Forming and Equipment, Beijing 100024, China;
4. AVIC Shaanxi Aircraft Industry Co., Ltd., Hanzhong 723213, China;
5. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;
6. College of Aerospace Engineering, Chongqing University, Chongqing 400044, China;
7. School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, China |
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Abstract Titanium alloy hollow lattice has excellent mechanical properties and physical functions, which is a typical load-function integration structure, and has good application prospects in future aircraft. The superplastic tensile elongation of TA15 and TA32 titanium alloys was measured by uniaxial tensile method at different temperatures and strain rates, the maximum elongation reached 1450% and 950% respectively. The diffusion bonding tests of TA15 and TA32 titanium alloys were carried out at different temperatures and pressures. According to the superplastic tensile and diffusion bonding tests, the optimal process parameters of superplastic forming and diffusion bonding were determined as 920 ℃/1.5–2.0 MPa/2 h. The hollow lattice structure of TA15 and TA32 titanium alloys with different configurations and geometric parameters were formed by superplastic forming/diffusion bonding (SPF/DB) process at optimal craft. The mechanical properties of titanium alloy hollow lattice were measured by flat compression and three-point bending method, the maximum strength reached 23.83 MPa and 596 MPa respectively. The influence of geometric parameters on the flat compression and bending properties of titanium alloy hollow lattice was studied by means of finite element analysis and experimental analysis. The thermal insulation performance of titanium alloy hollow lattice structure was studied by measuring the temperature difference between the cold and hot surfaces by single-side heating method. At 400 ℃/1 h, the thermal insulation temperature difference reached 276.3 – 310 ℃.
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PENG Peng, LIU Taiying, JIANG Shaosong, HOU Chenrui, ZHANG Jinyuan, LI Yang,YANG Shang, HAN Cong, LU Zhen. Superplastic Forming/Diffusion Bonding Technology for Hollow Double Layer Structure of TA15 Titanium Alloy With Local Weight Reduction[J]. Aeronautical Manufacturing Technology, 2023, 66(9): 68-74. |
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2023, 
