Abstract
The primary requirement of aircraft design is safety. The fatigue fracture is difficult to detect and prevent, which is a major safety hazard during aircraft service. In this paper, the influence of solution heat treatment on the microstructure and resistant of fatigue crack growth of 7050 alloy is investigated. For one-stage solution heat treatment, with the solution temperature increases, the area fraction of the coarse constituent phase decreases and the recrystallization fraction increase, and conresponsively the strength and fracture toughness increase and the fatigue crack growth rates decrease. Under the two-stage solution heat treatment, the alloy has the best fatigue crack growth resistance compare with the one-stage solution heat treatments. The effect of solution heat treatment on the properties can be understood on the basis of the combined influence of the constituent phase and the recrystallized fraction.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
J.C. Williams, E.A. Starke, Progress in structural materials for aerospace systems, Acta Materiali, 51 (2003) 5775–5799.
J.S. Wang, Y.W. Kang and Ch.R. Li, Phase Diagram and Phase Equilibrium Studies on Ultra High Temperature Alloys of Nb-Si-Ti, Materials Science Forum, 849 (2016) 618–625.
J.D. Robson, Microstructural evolution in aluminium alloy 7050 during processing, Materials Science and Engineering A, 382 (2004) 112–121.
F.S. Lin and E.A. Starke. The effect of copper content and degree of recrystallization on the fatigue resistance of 7xxx-type aluminum alloys, Materials Science and Engineering, 43 (1980) 65–76.
J.J. Schubbe. Fatigue crack propagation in 7050-T7451 plate alloy, Engineering Fracture Mechanics, 76 (2009) 1037–1048.
T.S. Srivatsan, S. Anand, S. Sriram, V.K. Vasudevan. The high-cycle fatigue and fracture behavior of aluminum alloy 7055, Materials Science and Engineering A, 281 (2000) 292–304.
S.S. Singh, C. Schwartzstein, J. J. Williams, X.H. Xiao, F.D. Carlo, N. Chawla. 3D microstructural characterization and mechanical properties of constituent particles in Al 7075 alloys using X-ray synchrotron tomography and nanoindentation, Journal of Alloys and Compounds, 602 (2014) 163–174.
N.M. Han, X.M. Zhang, S.D. Liu, D.G. He, R. Zhang. Effect of solution treatment on the strength and fracture toughness of aluminum alloy 7050, Journal of Alloys and Compounds, 509 (2011) 4138–4145.
N.U. Deshpande, A.M. Gokhale, D.K. Ddnzer, and J. Liu. Relationship between Fracture Toughness, Fracture Path, and Microstructure of 7050 Aluminum Alloy: Part II. Multiple Micromechanisms-Based Fracture Toughness Model, Metallurgical and materials transactions A, 29A (1998) 1203–1210.
O.E. Alarcon, A.M.M. Nazar, W.A. Monteiro. The effect of microstructure on the mechanical behavior and fracture mechanism in a 7050-T76 aluminum alloy, Materials Science and Engineering A, 138 (1991) 275–285.
S. Suresh, R.O. Ritchie. Propagation of short fatigue cracks, International Metals Review, 29 (1984) 455–476.
J. J. Schubbe. Fatigue crack propagation in 7050-T7451 plate alloy, Engineering Fracture Mechanics, 76 (2009) 1037–1048.
R. Bao, X. Zhang. Fatigue crack growth behaviour and life prediction for 2324-T39 and 7050-T7451 aluminium alloys under truncated load spectra, International Journal of Fatigue, 32 (2010) 1180–1189.
J.J. Schubbe. Evaluation of fatigue life and crack growth rates in 7050-T7451 aluminum plate for T-L and L-S oriented failure under truncated spectra loading, Engineering Failure Analysis, 16 (2009) 340–349.
Acknowledgements
This work was supported by The National Key R&D Program of China (Project No. 2016YFB0300900).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Xiao, X., Li, W., Zhao, J., Liu, C. (2018). Effect of Solution Treatment on the Microstructure and Fatigue Properties of 7050 Aluminum Alloy. In: Han, Y. (eds) High Performance Structural Materials. CMC 2017. Springer, Singapore. https://doi.org/10.1007/978-981-13-0104-9_25
Download citation
DOI: https://doi.org/10.1007/978-981-13-0104-9_25
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-13-0103-2
Online ISBN: 978-981-13-0104-9
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)