The Physics of Weld Bead Defects
The Physics of Weld Bead Defects
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DOI：
10.5772/50668
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发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
P. Wei
中科院分区：
文献类型：
--
作者：
P. Wei
通过提高焊接速度和焊接电流，可以提高不同焊接工艺的生产率。然而，这一策略受到表面缺陷的出现的限制，如波纹、驼峰、底切等[1]。例如，焊接波纹在凝固表面上显示出相当规则的弧形地形特征，如图1所示的Al 6061电子束焊接[2]。涟漪略高于水面。图2显示了由Pedraza等人提供的p偏振激光照射的硅表面上的波纹结构。[3]。注意条纹下缘的细小“手指”和向下的条纹轮廓的不对称性。
Productivity in different welding techniques can be improved by increasing welding speed and current. This strategy, however, is limited by the appearance of surface defects such as rippling, humping, undercutting, etc [1]. Weld ripples exhibit rather regular, arc-shaped topographic features on a solidified surface, for example, as shown in Figure 1 in EBW of Al 6061 [2]. The ripples slightly elevate above the surface. Figure 2 shows a rippling structure on silicon surface irradiated by a p-polarized laser beam, provided by Pedraza et al. [3]. Notice tiny little “fingers” in lower rim of fringes and asymmetry in fringe profile taken in downward direction.