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Semi-quantitative evaluation of texture components and fatigue properties in 2524 T3 aluminum alloy sheets

机译:2524 T3铝合金薄板织构和疲劳性能的半定量评估

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摘要

Effect of main texture components (Cube, Goss and Brass) on the fatigue property of 2524 T3 (Al-Cu-Mg) aluminum alloy sheet was investigated by means of X-Ray diffraction, electron back scattering diffraction, scanning electron microscopy, transmission electron microscopy and fatigue tests. A new kind of factors, which was based on the intensity ratio of texture components, were firstly defined to evaluate and discuss the relationship between texture components and the fatigue crack growth (FCG) rate semi-quantitatively. The results showed that the rate of FCG in the stable stage (Ⅱ) decreased with an increase of the factor F_(CGB) (the intensity ratio of Cube to Brass texture) obviously. When the new factor F_(CGB), F_(CG) (the intensity ratio of Cube to Goss texture), and F_(GB) (the intensity ratio of Goss to Brass texture) all exceeded than 1, as well as F_(CG) was close to F_(GB), the 2524 T3 sheet exhibited the lowest fatigue crack growth rate (ΔK=33 MPa m~(1/2), da/dN<2.0 × 10~(-3)). The Schmid factor and misorientation of grains boundaries would be responsible for such influence on the fatigue property.
机译:通过X射线衍射,电子背散射衍射,扫描电镜,透射电子等手段研究了主要织构成分(立方,高斯和黄铜)对2524 T3(Al-Cu-Mg)铝合金薄板疲劳性能的影响。显微镜和疲劳测试。首先定义了一种新的基于纹理成分强度比的因子,以半定量地评价和讨论纹理成分与疲劳裂纹扩展率之间的关系。结果表明,稳定阶段(Ⅱ)的FCG发生率随着因子F_(CGB)(立方体与黄铜质地的强度比)的增加而降低。当新因子F_(CGB),F_(CG)(立方体与高斯纹理的强度比)和F_(GB)(戈斯与黄铜纹理的强度比)都超过1时,F_(CG )接近F_(GB),则2524 T3板表现出最低的疲劳裂纹扩展速率(ΔK= 33 MPa m〜(1/2),da / dN <2.0×10〜(-3))。施密特因子和晶界取向错误会导致这种对疲劳性能的影响。

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  • 来源
    《Materials Science and Engineering》 |2016年第7期|15-25|共11页
  • 作者单位

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China,Light Alloy Research Institute, Central South University, Changsha, Hunan, 410083, China,National Collaborative Innovation Center of Advanced Nonferrous Structural Materials and Manufacturing, Central South University, Changsha 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

    School of Materials Science and Engineering, Central South University, Changsha, Hunan 410083, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Aluminum alloy; Fatigue crack growth; Intensity ratio; Schmid factor; Misorientation;

    机译:铝合金;疲劳裂纹扩展;强度比;施密特因子方向错误;

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