Abstract: Spray deposited 7055 aluminum alloy is widely used in aerospace and defense fields due to its light weight, high strength, good corrosion resistance and toughness. With the development of science and technology, there is a higer requirement for the comprehensive properties of aluminum alloys, especially for fatigue properties. Under the action of long-term strain and alternating load, long-term accumulation of damage will eventually leads to material fracture. In order to improve the fatigue failure, it is necessary to study the influence of different heat treatment processes on the alloy to improve the application performance of the alloy. The microstructure and precipitated phase fatigue fracture morphology of spray deposited 7055 aluminum alloy under three states of under-aging ( 120 ℃×1 h ), peak-aging ( 120 ℃×10 h ) and over-aging ( 120 ℃×44 h ) were analyzed here. The results show that the three aged alloys are under the stress amplitude of 300 MPa. The over-aged alloy shows better fatigue performance, and the fatigue life is 222 000 times. With the extension of aging time, the precipitated phase in the matrix obviously coarsens and grows, and the precipitated phase evolves from GP zone and η′ phase to η′ phase and η phase.
1 Li Y, Lu B, Yu W, et al. Journal of Alloys and Compounds, 2021, 882, 160789. 2 Tang J, Zhang H, Teng J, et al. Journal of Alloys and Compounds, 2019, 806, 1081. 3 He Z H, Guo H F, Wang K S, et al. Hot Working Process, 2019, 48(14), 178(in Chinese). 何智慧, 郭洪飞, 王克山等. 热加工工艺, 2019, 48(14), 178. 4 Ma S C, Zhao Y, Pu J H, et al. Journal of Manufacturing Processes, 2019, 46, 304. 5 Zhao M, Guo H F, Hou X H, et, al. Material Guide, 2024, 38(17), 100(in Chinese). 赵敏, 郭洪飞, 侯小虎, 等. 材料导报, 2024, 38(17), 100. 6 Zhang Q, Hu Y, Wang J, et al. Journal of Magnesium and Alloys, 2023, 11(1), 192. 7 Zhang P, Li Y Y, Liu Y, et al. Vacuum, 2019, 171(c), 109005. 8 Liang B, Wu S, Guo H F, et al. Hot Working Process, 2020, 49(4), 18(in Chinese). 梁波, 武松, 郭洪飞等. 热加工工艺, 2020, 49(4), 18. 9 Li Y, Deng Y L, Fan S T, et al. Journal of Alloys and Compounds, 2020, 829, 154612. 10 Chen Z G, Yuan Z G, Ren J K. Journal of Alloys and Compounds, 2020, 8(28), 154446. 11 Shan C J, Liu S D, Zhang X M. Rare Metal Materials and Engineering, 2021, 50(5), 1808(in Chinese). 单朝军, 刘胜胆, 张新明. 稀有金属材料与工程, 2021, 50(5), 1807. 12 Zhang Q, Zhu Y M, Gao X, et al. Nature Communications, 2020, 11(1), 5198. 13 Zhou H, Zhang Z. Material Engineering, 2019, 47(3), 137(in Chinese). 周航, 张峥. 材料工程, 2019, 47(3), 137. 14 Yu M, Zhang Y, Li X, et al. . MateriLetters, 2020, 2(75), 128074. 15 Wang Y, Tang J G, Deng Y L. Journal of Central South University(Natural Science Edition), 2018, 49(11), 2671(in Chinese). 王勇, 唐建国, 邓运来. 中南大学学报(自然科学版), 2018, 49(11), 2671. 16 Zhang J H. Effect of aging process on microstructure and fatigue properties of 7N01 aluminum alloy. Ph. D. Thesis, Harbin Polytechnic Institute, China, 2020(in Chinese). 张健辉. 时效工艺对7N01铝合金显微组织和疲劳性能的影响. 博士学位论文, 哈尔滨工业大学, 2020. 17 Sharma V, Kumar K S, Rao B N, et al. Materials Science and Enginee-ring A, 2011, 528(12), 4040. 18 Antunes A M B S, Baptista C A R P, Barboza M J R, et al. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2019, 41(8), 1. 19 Cheng Y J, Leng L, Gong B S, et al. Journal of Material Heat Treatment, 2021, 42(5), 28 (in Chinese). 程亚军, 冷利, 宫柏山, 等. 材料热处理学报, 2021, 42(5), 27. 20 Zheng Z Q, Chen Y Y, Zhong L P. Chinese Journal of Nonferrous Metals, 2010(1), 37(in Chinese). 郑子樵, 陈圆圆, 钟利萍. 中国有色金属学报, 2010(1), 37. 21 Kai W, Xiong B, Zhang Y, et al. Materials Science & Engineering A, 2018, 716, 42. 22 Wang Y L, Pan Q L, Wei L L, et al. Materials & Design, 2014, 55(c), 857. 23 Ma G X. Effect of solid solution process on microstructure and properties of spray deposited 7055 aluminum alloy extruded bar. Master’s Thesis, Inner Mongolia University of Technology, China, 2011 (in Chinese). 马国喜. 固溶工艺对喷射沉积7055铝合金挤压棒材组织性能的影响. 硕士研究生论文, 内蒙古工业大学, 2021. 24 Guo H F, Gao W H, Hao X, et al. Heat Treatment of Metals, 2009, 34(2), 44 (in Chinese). 郭洪飞, 高文海, 郝新等. 金属热处理, 2009, 34(2), 45. 25 Sadananda K, Adlakha I, Solanki K N, et al. Crystals, 2020, 10(5), 358. 26 Yuan D L, Chen S Y, Chen K H, et al. Transactions of Nonferrous Metals Society of China, 2021, 31(8), 2220. 27 Liu L L, Pan Q L, Wang X D, et al. Journal of Alloys and Compounds, 2018, 735, 261.
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2025, Vol. 39 
