Microstructure and mechanical properties of pulsed laser welded Al/steel dissimilar joint

作者：Yang, Jin; Li, Yu-long^*; Zhang, Hua

来源：Transactions of Nonferrous Metals Society of China, 2016, 26(4): 994-1002.

DOI：10.1016/S1003-6326(16)64196-1

• pulsed laser welding
• steel
• aluminum
• microstructure
• mechanical property

Pulsed laser welding was used in joining pure aluminum to stainless steel in a lap joint configuration. It is found that the mechanical properties of the laser joints were closely correlated with the bead geometry, i.e., penetration depth. In order to study the correlation, two typical laser welds with different penetration depths were analyzed. In high penetration depth (354 mu m) joint, Al-rich Fe-Al IMCs with microcracks were formed at the Al/fusion zone (FZ) interface. The joint strength was found to be (27.2 +/- 1.7) N/mm and three failure modes were observed near the Al/FZ interface. In low penetration depth (108 mu m) joint, Fe-rich Fe-Al IMCs without any defect were formed at the Al/FZ interface. The joint strength was found to be (46.2 +/- 1.9) N/mm and one failure mode was observed across the FZ.

• 出版日期2016-4
• 单位南昌大学