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首页> 外文期刊>International Journal of Fatigue >Effects of ultrasonic impact treatment on pre-fatigue loaded high-strength steel welded joints
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Effects of ultrasonic impact treatment on pre-fatigue loaded high-strength steel welded joints

机译：超声冲击处理对疲劳前高强度钢焊接接头的影响

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摘要

Comparative fatigue tests were conducted on as-welded, weld toe peened specimens before and after fatigue loading. Fracture surface, residual stress, microstructure and hardness were determined. The test results showed that as the pre-fatigue loading period extended, deeper cracks may have initiated and propagated and the fatigue life improvement decreased. The processes of ultrasonic peening on welded joints with existing cracks were modeled by finite element analysis. The numerical results indicated that the mechanism of UIT improving fatigue performance included two factors: compressive residual stress and the change of crack orientation. Both effects reduced as the crack became deeper.
机译：在疲劳载荷之前和之后，对焊接后的焊趾喷丸试样进行比较疲劳试验。确定了断裂表面，残余应力，显微组织和硬度。试验结果表明，随着疲劳前加载时间的延长，可能会出现并扩展出更深的裂纹，从而降低疲劳寿命。通过有限元分析，对存在裂纹的焊接接头进行了超声波喷丸处理。数值结果表明，UIT改善疲劳性能的机理包括两个因素：残余压缩应力和裂纹取向的变化。随着裂纹的加深，两种效果均降低。

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  • 来源
    《International Journal of Fatigue》 |2015年第11期|278-287|共10页
  • 作者

    Hai Zhang; Dongpo Wang; Liqian Xia; Zhenyu Lei; Yizhe Li;

  • 作者单位

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology,Tianjin 300072, 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

    Ultrasonic impact treatment; Pre-fatigue; Fatigue life; Cracks; Finite element analysis;

    机译：超声波冲击处理;疲劳前疲劳生活;裂缝;有限元分析;

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