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首页> 外文期刊>Materials Science and Engineering >Effect of the welding profile generated by the modified indirect electric arc technique on the fatigue behavior of 6061-T6 aluminum alloy
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Effect of the welding profile generated by the modified indirect electric arc technique on the fatigue behavior of 6061-T6 aluminum alloy

机译：改进间接电弧技术产生的焊接轮廓对6061-T6铝合金疲劳性能的影响

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摘要

This paper reports the effect of the welding profile generated by the modified indirect electric arc (MIEA) technique on the fatigue behavior of 6061-T6 welded joints. The calculations are based on the effect of the stress concentration factor produced by the characteristic geometry of the welding profile formed during the welding process. It was found that the fatigue life of welded samples using this welding technique was larger in comparison with data reported in the literature. Also, measurements of microhardness and tension testing were performed to account for the effect of different levels of fatigue damage on the mechanical properties of these welds. Experimental findings reveal that, with reference to undamaged samples, fatigue damage increases the microhardness in the weld metal and heat affected zone (HAZ) whereas it only produces a moderate increase in yield strength of approximately 14% for a 75% of fatigue damage. Tensile and fatigue tests indicate that the thermal affection undergone by the plates during fusion welding dictates failure in the HAZ under tension stress but not under fatigue. The failure mechanism under fatigue is discussed in terms of theoretical analyses and fractography.
机译：本文报告了改进的间接电弧（MIEA）技术生成的焊接轮廓对6061-T6焊接接头疲劳性能的影响。这些计算是基于在焊接过程中形成的焊接轮廓的特征几何形状所产生的应力集中系数的影响。发现与文献报道的数据相比，使用这种焊接技术的焊接样品的疲劳寿命更长。而且，进行了显微硬度和张力测试的测量，以说明不同程度的疲劳损伤对这些焊缝的机械性能的影响。实验结果表明，相对于未损坏的样品，疲劳损伤会增加焊接金属和热影响区（HAZ）的显微硬度，而对于75％的疲劳损伤，它只会使屈服强度适度增加约14％。拉伸和疲劳试验表明，在熔融焊接过程中，板的热影响决定了在拉应力下热影响区的失效，但在疲劳下却没有。从理论分析和分形学的角度探讨了疲劳下的失效机理。

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  • 来源
    《Materials Science and Engineering》 |2010年第8期|2057-2064|共8页
  • 作者

    R.R. Ambriz; G. Mesmacque; A. Ruiz; A. Amrouche; V.H. Lopez;

  • 作者单位

    Universite Lille Nord de France, F-59000 Lille, France USTL, LML, F-59650 Villeneuve d'Ascq, France CNRS, UMR 8107, F-59650 Villeneuve d'Ascq, France Rue de la recherche BP 179,59653 Villeneuve d'Ascq,France;

    Universite Lille Nord de France, F-59000 Lille, France USTL, LML, F-59650 Villeneuve d'Ascq, France CNRS, UMR 8107, F-59650 Villeneuve d'Ascq, France;

    Instituto de Investigaciones Metalurgicas, Universidad Michoacana de San Nicolas de Hidalgo, A.P. 888, C.P. 58000, Morelia Michoacan, Mexico;

    Universite Lille Nord de France, F-59000 Lille, France USTL, LML, F-59650 Villeneuve d'Ascq, France CNRS, UMR 8107, F-59650 Villeneuve d'Ascq, France;

    Instituto de Investigaciones Metalurgicas, Universidad Michoacana de San Nicolas de Hidalgo, A.P. 888, C.P. 58000, Morelia Michoacan, Mexico;

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

    fatigue; welding; 6061-T6; damage; stress concentration factor; MIEA;

    机译：疲劳;焊接;6061-T6;损伤;应力集中系数;MIEA;

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