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The microstructural evolution of friction stir welded AA6082-T6 aluminum alloy during cyclic deformation

机译:搅拌摩擦焊接AA6082-T6铝合金循环变形的组织演变。

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摘要

The fatigue behavior of a thick section friction stir welded AA6082-T6 aluminum alloy was studied to compare damage mechanisms in the weld zone and the base metal. Fully reversed tension-compression strain-controlled fatigue tests were conducted to determine the cyclic stress response and stored energy to failure. Microstructure evolution during cyclic straining was followed using secondary electron imaging and electron backscatter diffraction in a scanning electron microscope. Fatigue cracking along grain boundaries and the formation of slip bands were observed to be the fatigue-induced microstructural features in the friction-stir-welded structure. In the base metal, micron-sized particles led to particle-induced cracking.
机译:研究了厚截面搅拌摩擦焊接AA6082-T6铝合金的疲劳行为,比较了焊接区和母材的损伤机理。进行了完全反向的拉伸-压缩应变控制疲劳测试,以确定循环应力响应和存储的失效能量。使用扫描电子显微镜中的二次电子成像和电子背散射衍射,跟踪循环应变过程中的微观结构演变。观察到沿晶界的疲劳裂纹和滑移带的形成是搅拌摩擦焊接结构中疲劳引起的微观结构特征。在贱金属中,微米级的颗粒导致颗粒引起的开裂。

著录项

  • 来源
    《Materials Science and Engineering》 |2015年第26期|366-376|共11页
  • 作者单位

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finland,Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43721, Egypt,Metallurgical and Materials Engineering Department, Faculty of Petroleum & Mining Engineering, Suez University, P.O. Box 43721, Suez 43721, Egypt;

    Oulu Southern Institute, University of Oulu, Pajatie 5, FI-85500 Nivala, Finland;

    Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering, Suez University, Suez 43721, Egypt;

    Oulu Southern Institute, University of Oulu, Pajatie 5, FI-85500 Nivala, Finland;

    Department of Materials Science and Engineering, The University of Sheffield, Mappin Street, Sheffield S1 3JD, UK;

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finland;

    Centre for Advanced Steels Research, University of Oulu, P.O. Box 4200, FI-90014 Oulu, Finland;

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

    Aluminum alloys; Friction stir welding; Fatigue; Cyclic deformation; Grain boundary cracking;

    机译:铝合金;搅拌摩擦焊;疲劳;循环变形;晶界裂纹;

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