Study on fatigue performance of 7075-T651 aluminum alloys

被引：8
|
作者：
Han J. [1 ]
Dai Q.-X. [1 ]
Zhao Y.-T. [1 ]
Li G.-R. [1 ]
机构：
[1] School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu
来源：
Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2010年 / 30卷 / 04期
关键词：
7075-T651 aluminum alloy; Fatigue fracture; S-N curve;
D O I：
10.3969/j.issn.1005-5053.2010.4.018
中图分类号：
学科分类号：
摘要：
The fatigue life experiments of 7075-T651 aluminum alloy were conducted under different stress amplitude and S-N curves was gained from fitting the experimental data. An estimation of detailed fatigue limit result was 223MPa. The fractography of high stress amplitude and low stress amplitude using scanning microscope displayed that the crack initiation mostly derived from the interior flaw or inclusion, and crack propagation gone with the quasi-cleavage crack. The crack propagation regions under high stress amplitude was characterized by furrow and tyre patterns while lots of fatigue fringe together with the fatigue sidestep and secondary crack generated in the crack propagation regions of low stress amplitude. The tearing edge and equiaxial dimples existed in fatigue failure region of both high stress amplitude and low stress amplitude fracture surface. The bulky inclusion particles can be the crack initiation while dispersion of tiny precipitated phase has a positive influence on fatigue performance of 7075-T651 aluminum alloy.
引用
收藏
页码：92 / 96
页数：4
相关论文
共 14 条
  • [1] 11, 3, pp. 412-415, (2001)
  • [2] Lukasak D.A., Hart R.M., Strong aluminum alloy shave airframe weight, Advanced Materials & Processes, 10, pp. 46-49, (1991)
  • [3] Cassada W., Liu J., Taley J., Aluminum alloys for aircraft structure, Advanced Materials Processes, 12, pp. 27-29, (2002)
  • [4] Lee S.-Y., Lee J.-H., Lee Y.-S., Characterization of Al 7075 alloys after cold working and heating in the semi-solid temperature range, Journals of Material Processing Technology, 111, pp. 42-44, (2001)
  • [5] Zhao T.-W., Jiang Y.-Y., Fatigue of 7075-T651 aluminum alloy, International Journal of Fatigue, 30, pp. 834-849, (2008)
  • [6] Zhao T.-W., Zhang J.-X., Jiang Y.-Y., A study of fatigue crack growth of 7075-T651 aluminum alloy, International Journal of Fatigue, 30, pp. 1169-1180, (2008)
  • [7] Xue Y., Mcdowell D.L., Horstmeyer M.F., Microstructure-based multistage fatigue modeling of aluminum alloy 7075-T651, Engineering Fracture Mechanics, 74, pp. 2810-2823, (2007)
  • [8] Stanzl-Tschegg S.E., Plasser O., Tschegg E.K., Influence of microstructure and load ratio on fatigue threshold behavior in 7075 aluminum alloy, International Journal of Fatigue, 21, (1999)
  • [9] (2001)
  • [10] (1998)
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