航空学报 > 2007, Vol. 28 Issue (5): 1272-1275

点蚀损伤7075-T6铝合金弹性性能计算模型的理论与实验研究

毋玲,孙秦,郭英男   

  1. 西北工业大学 航空学院
  • 收稿日期:2006-10-18 修回日期:2007-03-12 出版日期:2007-10-15 发布日期:2007-10-15
  • 通讯作者: 毋玲

Theoretical and Experimental Research for the Elastic Properties ofCorroded 7075-T6 Al Alloy

Wu Ling,Sun Qin,Guo Yingnan   

  1. School of Aeronautics, Northwestern Polytechnical University
  • Received:2006-10-18 Revised:2007-03-12 Online:2007-10-15 Published:2007-10-15
  • Contact: Wu Ling

摘要:

点蚀坑是高强度铝合金材料中广泛存在的一种腐蚀形式,这种点蚀损伤会导致材料性能的下降,严重地威胁着结构的承载能力。根据点蚀损伤的特点,在细观力学的理论基础上,建立了点蚀损伤材料弹性性能计算的孔隙率模型。使用7075-T6铝合金,在连续酸性盐雾环境下进行预腐蚀。根据预腐蚀件的拉伸实验结果,对模型的正确性进行验证。模型计算与实验结果的对比证明了本文方法的可行性与正确性。

关键词: 点蚀坑, 铝合金, 细观力学

Abstract:

The researches were aimed at assessing the elastic properties of material with preexisting corrosion damage. Corrosion in the form of pitting in certain classes of aluminum alloys, e.g. 7075-T6, is considered here. Based on the characteristics of corrosion metrics and micromechanics, the paper describes a mechanical property prediction procedure for corroded aluminum alloy. The model was developed in the framework of micro-mechanics, in combination with the existing corroded coupon tensile test results.

Key words: corrosion , pit,  , aluminum , alloy,  , micromechanics

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