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Effects of laser peening with different coverage areas on fatigue crack growth properties of 6061-T6 aluminum alloy

机译：不同覆盖面积的激光喷丸处理对6061-T6铝合金疲劳裂纹扩展性能的影响

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摘要

The effects of coverage area on fatigue crack growth (FCG) properties of 6061-T6 aluminum alloy subject to multiple laser peening (LP) impacts were investigated. Residual stress, micro-structure and fatigue striation pattern on fracture cross-sections were analyzed. Compressive residual stresses and dense dislocation arrangements can be found in the superficial layer after LP. LP coverage area has a direct influence on FCG properties as verified by different size of shell ridges and fatigue striation spacing on fracture cross-sections. Meanwhile, FCG rate decreases with the increase of compressive residual stresses distribution perpendicular to the crack growth direction in the initial FCG stage.
机译：研究了覆盖面积对6061-T6铝合金在多次激光喷丸（LP）冲击下的疲劳裂纹扩展（FCG）性能的影响。分析了断裂截面上的残余应力，微观结构和疲劳条纹。 LP后，在表层发现压缩残余应力和致密的位错排列。 LP覆盖区域对FCG性能有直接影响，已通过不同的壳脊尺寸和断裂截面上的疲劳条纹间距证明。同时，FCG速率随着在FCG初始阶段垂直于裂纹扩展方向的残余压缩应力分布的增加而降低。

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  • 来源
    《International Journal of Fatigue》 |2013年第2期|292-299|共8页
  • 作者

    S. Huang; J.Z. Zhou; J. Sheng; K.Y. Luo; J.Z. Lu; Z.C. Xu; X.K. Meng; L. Dai; L.D. Zuo; H.Y. Ruan; H.S.Chen;

  • 作者单位

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China,V-zenith Laser Technology Company, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China,V-zenith Laser Technology Company, Zhenjiang 212013, PR China;

    School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser peening; fatigue crack growth rate; fracture; fatigue striation; coverage area;

    机译：激光喷丸疲劳裂纹扩展率;断裂;疲劳条纹覆盖区域;

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