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Effect of pre-corrosion and corrosion/fatigue alternation frequency on the fatigue life of 7B04-T6 aluminum alloy

Published online by Cambridge University Press:  05 December 2016

Tengfei Cui ,
Daoxin Liu ,
Jian Cai  and
Xiaohua Zhang
Tengfei Cui
Affiliation:
Corrosion and Protection Research Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Daoxin Liu*
Affiliation:
Corrosion and Protection Research Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Jian Cai
Affiliation:
Corrosion and Protection Research Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
Xiaohua Zhang
Affiliation:
Corrosion and Protection Research Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
*
a) Address all correspondence to this author. e-mail: Liudaox@nwpu.edu.cn
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Abstract

Influence of corrosion/fatigue factors on the fatigue life of 7B04-T6 aluminum alloys were studied in this paper. Different kinds of alternating corrosion-fatigue tests were carried out. Three factors influencing fatigue life were investigated: pre-corrosion time, corrosion/fatigue alternation frequency, and specimen’s size. The results show that: with the extension of pre-corrosion time, fatigue lives decreased; although the total corrosion time was the same (192 h), as the corrosion/fatigue alternation frequency increased, the total fatigue lives increased. The total fatigue lives of specimens subjected to two, four, and six corrosion/fatigue cycles (n = 2, 4, 6), in which specimens underwent pre-corrosion for 96 h per cycle (n = 2), 48 h per cycle (n = 4), and 32 h per cycle (n = 6), respectively, was measured. It was found that the fatigue lives increased by 56.4, 84.4, 136%, as the number of cycles increased, compared to tests in which no alternation took place (192 h of continuous corrosion). When exposed to the same corrosion times, different sized specimens demonstrated different fatigue lives. The fatigue lives of small specimens were shorter than the larger specimens. These results are all due to the specific properties of corrosion/fatigue factors.

Keywords

7B04-T6 aluminum alloycorrosionfatigueenvironment/load spectrumsize effect
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 24 , 28 December 2016 , pp. 3869 - 3879
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Copyright
Copyright © Materials Research Society 2016 

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References

REFERENCES

Barter, S.A. and Molent, L.: Fatigue cracking from a corrosion pit in an aircraft bulkhead. Eng. Failure Anal. 39, 155 (2014).Google Scholar
Borrego, L.P., Costa, J.M., Silva, S., and Ferreira, J.M.: Microstructure dependent fatigue crack growth in aged hardened aluminium alloys. Int. J. Fatigue 26, 1321 (2004).Google Scholar
McNaughtan, D., Worsfold, M., and Robinson, M.J.: Corrosion product force measurements in the study of exfoliation and stress corrosion cracking in high strength aluminium alloys. Corr. Sci. 45, 2377 (2003).CrossRefGoogle Scholar
Dan, Z., Muto, I., and Hara, N.: Effects of environmental factors on atmospheric corrosion of aluminium and its alloys under constant dew point conditions. Corr. Sci. 57, 22 (2012).Google Scholar
Zheng, S., Yu, Q., Gao, Z., and Jiang, Y.: Loading history effect on fatigue crack growth of extruded AZ31B magnesium alloy. Eng. Fract. Mech. 114, 42 (2013).Google Scholar
Zupanca, U. and Grum, J.: Effect of pitting corrosion on fatigue performance of shot-peened aluminium alloy 7075-T651. J. Mater. Process. Technol. 210, 1197 (2010).Google Scholar
Jiang, Z.G., Tian, D.S., and Zhou, Z.T.: Load/Environment Spectrum of Aircraft Structure, 4th ed. (Electronic Industry press, Beijing, China, 2012); p. 413.Google Scholar
Li, Y.H., Liu, W.T., and Jia, G.R.: The Evaluate the Calendar Life Application Example of Military Aircraft Structure System, 5th ed. (Electronic Industry Press, Beijing, China, 2005); p. 274.Google Scholar
Jones, K., Shinde, S.R., Clark, P.N., and David, W.H.: Effect of prior corrosion on short crack behavior in 2A12-T3 aluminum. Corr. Sci. 50, 2588 (2008).Google Scholar
Alexopoulos, N.D., Dalakouras, C.J., Skarvelis, P., and Stavros, K.K.: Accelerated corrosion exposure in ultra thin sheets of 2024 aircraft aluminium alloy for GLARE applications. Corr. Sci. 55, 289 (2012).Google Scholar
Miller, R.N. and Schuessler, R.L.: Predicting service life of aircraft coating in various environments. Corrosion 4, 17 (1989).Google Scholar
Liu, W.T., Li, Y.H., and Jia, G.Y.: Evaluation Technique for Calendar Life System of Aircraft Structure, 3th ed. (Electronic Industry Press, Beijing, China, 2004); p. 187.Google Scholar
Crawford, B.R., Loader, C., Liu, Q., Harrison, T.J., and Khan Sharp, P.: Can pitting corrosion change the location of fatigue failures in aircraft? Int. J. Fatigue 61, 304 (2014).CrossRefGoogle Scholar
Wang, C.Q., Xiong, J.J., Shenoi, R.A., Liu, M.D., and Liu, J.Z.: A modified model to depict corrosion fatigue crack growth behavior for evaluating residual lives of aluminum alloys. Int. J. Fatigue 83, 280 (2016).CrossRefGoogle Scholar
Burns, J.T., Kim, S., and Gangloff, R.P.: Effect of corrosion severity on fatigue evolution in Al–Zn–Mg–Cu. Corr. Sci. 52, 498 (2010).Google Scholar
Xu-Dong, L., Xi-Shu, W., Huai-Hui, R., Yin-Long, C., and Zhi-Tao, M.: Effect of prior corrosion state on the fatigue small cracking behavior of 6151-T6 aluminum alloy. Corr. Sci. 55, 26 (2012).Google Scholar
Cui, T., Liu, D., Zhang, X., and He, Y.: Effect of pre corrosion on the fatigue behavior of AA7B04 and life forecast. Mater. Corros. Available at: http://onlinelibrary.wiley.com/doi/10.1002/maco.201608894/full (accessed 18 March 2016).Google Scholar
Pao, P.S., Gill, S.J., and Feng, C.R.: On fatigue crack initiation from corrosion pits in 7075-T7351 aluminum alloy. Scr. Mater. 5, 43 (2000).Google Scholar
Jian, C., Daoxin, L., Zuoyan, Y., Xiaohua, Z., Yuting, H., and Tengfei, C.: Influence of cyclic action of corrosion and alternate load on fatigue life of 2A12-T4 aluminum alloy. J. Chin. Soc. Corros. Prot. 335, 61 (2015).Google Scholar