Synchrotron X-ray video of full-penetration laser welding of aluminum AA1050A

The video shows a synchrotron x-ray video of full-penetration laser welding of the aluminum alloy AA1050A (Al99.5). At the beginning of the video the transition from partial penetration welding with a keyhole which is closed at its bottom to full-penetration welding with a keyhole which is opened at its bottom can be observed. The images show that the fluctuations of the capillary’s geometry during the beginning of the process result in an excessive formation of pores. During the further progress of the process a reliable full-penetration process is achieved with an increased stability of the geometry of the keyhole. A detailed analysis of this transition and its implications on the absorptance are presented in the related publication.

本视频展示了铝合金AA1050A（Al99.5）全穿透激光焊接的同步辐射X射线视频。在视频伊始，可观察到从底部封闭的钥孔部分穿透焊接向底部开启的钥孔全穿透焊接的过渡。图像表明，在焊接过程初期，毛细管几何形状的波动导致了孔隙的过量生成。随着过程的进一步推进，实现了具有几何形状稳定性增强的可靠全穿透焊接。相关出版物对这一过渡及其对吸收率的影响进行了详细分析。