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首页> 外文期刊>International journal of steel structures >Study on Residual Stress Releasing of 316L Stainless Steel Welded Joints by Ultrasonic Impact Treatment
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Study on Residual Stress Releasing of 316L Stainless Steel Welded Joints by Ultrasonic Impact Treatment

机译：超声波撞击处理316L不锈钢焊接接头剩余应力释放研究

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摘要

In this paper, the effect of ultrasonic impact treatment (UIT) on the residual stress of 316L welded butt-joint was investigated. Firstly, the temperature field distribution in the welded joint was simulated based on the double-ellipsoidal heat source model, and the residual stresses were calculated by a sequential coupling thermo-mechanical finite element method. Subsequently, based on the theory of transient contact mechanics, the effects of UIT on releasing of the welding residual stress was analyzed. The microstructure of the weld metal before and after the UIT treatment was compared to study the influence of UIT. The results show that the maximum residual stresses in the weld metal and heat affected zones are released due to the dislocation multiplication during the UIT, and this effect on the weld metal is more remarkable than that on the heat affected zones. The results of numerical simulation of UIT are consistent with the corresponding experimental results. After UIT, the transverse and longitudinal tensile stresses near the fusion line are changed to compressive stresses.
机译：本文研究了超声波冲击处理（UIT）对316L焊接对接接头的残余应力的影响。首先，基于双椭圆形热源模型模拟焊接接头中的温度场分布，并通过序贯耦合热机械有限元方法计算残余应力。随后，基于瞬态接触力学理论，分析了UIT对焊接残余应力释放的影响。比较了UIT治疗前后焊接金属的微观结构，以研究UIT的影响。结果表明，由于UIT期间的位错倍增，焊接金属和热影响区域中的最大残余应力被释放，并且对焊接金属的这种效果比热影响的区域更显着。 UIT数值模拟结果与相应的实验结果一致。在UIT之后，融合线附近的横向和纵向拉伸应力改变为压缩应力。

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  • 来源
    《International journal of steel structures》 |2020年第3期|1014-1025|共12页
  • 作者

    Xiaodong Hu; Chongbin Ma; Yicheng Yang; Qingliang Zeng;

  • 作者单位

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 People's Republic of China;

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 People's Republic of China;

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 People's Republic of China;

    College of Mechanical and Electronic Engineering Shandong University of Science and Technology Qingdao 266590 People's Republic of China;

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

    Welded joint; Residual stress; Microstructure analysis; Ultrasonic impact treatment; Finite element method;

    机译：焊接接头;残余压力;微观结构分析;超声波冲击处理;有限元方法;

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