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首页> 外文学位 >Effets des desalignements geometriques et de l'aplanissement par laminage sur la resistance en fatigue des joints soudes bout a bout.
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Effets des desalignements geometriques et de l'aplanissement par laminage sur la resistance en fatigue des joints soudes bout a bout.

机译：几何错位和轧制变平对对接焊缝疲劳强度的影响。

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摘要

In the absence of standardized specimen geometry for fatigue testing of butt welded joints, the first phase of this research focused on the determination of the geometry of a representative test specimen. Base metal specimens (quenched and tempered AISI 410 steel), aligned welded joints, misaligned welded joints and joints with angular misalignment were tested for two thicknesses, 1 mm and 3 mm. The number of specimens was determined to have at least six representative fractures at each misalignment level and each thickness.;The last phase of the research deals with the improvement of the fatigue strength of welded joints by cold roll planishing along the weld bead. To emphasize the effect of this method, welded joints have been manufactured by the same process as that of "as welded" specimens, but with additional operations of annealing and roll planishing. The results of the fatigue testing show the improvement of the fatigue strength of aligned, misaligned and angular misaligned welded joints. The fatigue strength improvement of aligned welded joints is the result of the elimination of the weld geometry. The fatigue strength improvement of misaligned welded joints is the result of the simultaneous elimination of the misalignments and the weld geometry. The roll planishing process brings the fatigue strength of aligned and misaligned welded joints to approximately the same level as that of base metal. (Abstract shortened by UMI.)
机译：在没有用于对接焊缝疲劳测试的标准试样几何形状的情况下，该研究的第一阶段着重于确定代表性试样的几何形状。测试了两种厚度（1毫米和3毫米）的贱金属试样（调质的AISI 410钢），对准的焊接接头，错位的焊接接头和角度不对准的接头。确定的试样数量在每个未对准水平和每个厚度下均具有至少六个代表性断裂。研究的最后阶段涉及通过沿焊道进行冷轧平整来提高焊接接头的疲劳强度。为了强调这种方法的效果，采用与“作为焊接”试样相同的方法制造了焊接接头，但是还进行了退火和轧光加工。疲劳测试的结果表明，对准，错位和角度错位的焊接接头的疲劳强度得到了改善。对齐焊接接头疲劳强度的提高是消除焊接几何形状的结果。错位焊接接头的疲劳强度提高是同时消除错位和焊接几何形状的结果。滚压工艺使对准和未对准的焊接接头的疲劳强度达到与母材大致相同的水平。 （摘要由UMI缩短。）

著录项

  • 作者

    Farah, Assaf.;

  • 作者单位

    Ecole Polytechnique, Montreal (Canada).;

  • 授予单位 Ecole Polytechnique, Montreal (Canada).;
  • 学科 Engineering Metallurgy.
  • 学位 M.Sc.A.
  • 年度 2004
  • 页码 137 p.
  • 总页数 137
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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