航天铝合金变极性等离子弧焊焊接接头的腐蚀与疲劳交替研究

doi:10.11896/cldb.22100234

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Abstract With the concept of reusable spacecraft, multiple air-to-air round trips and ground repair processes have made alternating problems of corrosion and fatigue on reusable spacecraft cannot be ignored. In this work, variable polarity plasma arc welding was used to join 5 mm thick 5A06 aluminum magnesium alloy. The alternating corrosion-fatigue test was carried out to study the effect of different unit corrosion time on fatigue life. The specimens were characterized by scanning electron microscope and laser confocal microscope. The damage characteristics after the alternate action of corrosion and fatigue were analyzed. The results show that with the increase of unit corrosion time, the average alternating corrosion-fatigue life decrease first and then tend to be stable. That is mainly due to the fact that the corrosion passivated the fatigue crack tip and form new pitting pits. At the same time, the intrusion/extrusion and microcracks during the fatigue process reduce the surface stress concentration and increase the fatigue life relatively, thus the stable state of life reflects. The fracture locations are all in the heat affected zone, which mainly because the welding heat affected zone has poor corrosion resistance and easy to form serious corrosion damage. The large corrosion pits cause serious stress concentration and accelerates crack initiation.

Key words： 5A06 aluminum alloy variable polarity plasma arc welding(VPPAW) corrosion and fatigue alternation salt spray corrosion

Published: 25 June 2024 Online: 2024-07-17

CLC number:

TG146

Fund:Key Project (ZD-302), National Natural Science Foundation of China (52130509,52175206).

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	Articles by authors
	GAO Chong
	DONG Lihong
	WANG Haidou
	LI Bin
	LYU Xiaoren
	NIE Jiapeng

Cite this article:

GAO Chong,DONG Lihong,WANG Haidou, et al. Study on Corrosion and Fatigue Alternation of Aerospace Aluminum Alloy Welded Joints by Variable Polarity Plasma Arc Welding[J]. Materials Reports, 2024, 38(12): 22100234-7.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22100234 OR http://www.mater-rep.com/EN/Y2024/V38/I12/22100234

1 Guérin M, Alexis J, Andrieu E, et al. Materials and Design, 2015, 87(15), 681.
2 Dursun T, Soutis C. Materials and Design, 2014, 56(2), 862.
3 Shi L M, Yang P, Zhou Z Y, et al. Spacecraft Engineering, 2013, 22(5), 136 (in Chinese).
施丽铭, 杨鹏, 周志勇, 等. 航天器工程, 2013, 22(5), 136.
4 Liu X B, Qiao F B, Guo L J, et al. International Journal of Minerals Metallurgy & Materials, 2017, 24(2), 164.
5 Zhao Y, Zhan X, Zhou X, et al. The International Journal of Advanced Manufacturing Technology, 2021, 115(11-12), 4035.
6 Song K, Lv L, Zhu S, et al. The International Journal of Advanced Manufacturing Technology, 2021, 114(11-12), 3627.
7 Guo N, Fu Y, Wang Y, et al. Materials and Design, 2017, 113, 273.
8 Jiang X Q, Chen S J, Gong J L. Materials Characterization, 2018, 139, 70.
9 Zhao Y Q, Zhan X H, Gao Q Y, et al. Metals and Materials International, 2019, 26(3), 346.
10 Liu X B, Qiao F B, Guo L J, et al. International Journal of Minerals Metallurgy & Materials, 2017, 24(2), 164.
11 Lu N C, Wang M H, Hao G D, et al. Strength of Materials, 2020, 52(4), 532.
12 Zhang H X, Wu G H, Yan Z F, et al. The Chinese Journal of Nonferrous Metals, 2013, 23(2), 327.
13 Deng C, Wang H, Gong B, et al. Transactions of the China Welding Institution, 2015, 36(12), 61.
14 Sabelkin V, Perel V, Misak H, et al. Engineering Fracture Mechanics, 2015, 13(4), 111.
15 Zhang S, Zhang T, He Y, et al. Journal of Alloys and Compounds, 2019, 8(2), 511.
16 Fu L, Li H, Lin L, et al. Anti-Corrosion Methods and Materials, 2021, 68(5), 442.
17 Cui T, Liu D, Cai J, et al. Journal of Materials Research, 2016, 31(24), 3869.
18 Chen Y, Liu C, Zhou J, et al. Journal of Alloys and Compounds, 2019, 772(2), 1.
19 Chen Y J, Liu C C, Wang F S. Acta Aeronautica et Astronautica Sinica, 2019, 40(4), 222465(in Chinese).
陈亚军, 刘辰辰, 王付胜. 航空学报, 2019, 40(4), 186.
20 Narimani N, Zarei B, Pouraliakbar H, et al. Measurement, 2015, 62(2), 97.
21 Yang B, Tan C, Zhao Y, et al. Journal of Materials Research and Technology, 2020, 9(5), 9576.
22 Zhang S, Zhang T, He Y T, et al. International Journal of Fatigue, 2019, 129.
23 Chen Y L, Bian G X, Yi L, et al. Journal of Mechanical Engineering, 2012, 48 (20), 73(in Chinese).
陈跃良, 卞贵学, 衣林, 等. 机械工程学报, 2012, 48(20), 73.