Weld metal microstructural characteristics in pulsed Nd: YAG laser welding
Weld metal microstructural characteristics in pulsed Nd: YAG laser welding
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DOI：
10.1016/j.scriptamat.2007.02.019
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发表时间：
2007-06
影响因子：
6
通讯作者：
F. M. Ghaini;M. Hamedi;M. Torkamany;J. Sabbaghzadeh
中科院分区：
文献类型：
--
作者：
F. M. Ghaini;M. Hamedi;M. Torkamany;J. Sabbaghzadeh
通过试验研究了激光脉冲能量、持续时间和速度对低碳钢薄板点焊过程中焊缝尺寸、显微组织和硬度的影响。为了考虑重叠效应，定义了有效峰值功率密度。研究发现，即使是完全熔透焊接，由于快速凝固，焊接点内焊缝的显微组织和硬度也会发生显著变化。
Experimental investigations were carried out to examine the influence of laser pulse energy, duration, and travel speed on weld dimension, microstructure and hardness during overlap laser bead on plate spot welding of low carbon steel. Effective peak power density is defined for taking into account the effect of overlapping. It was found that even with full penetration welds there can be significant variation in the microstructure and hardness of weld within a weld spot due to the very rapid solidification.