Interface characteristics and mechanical properties of the induction brazed joint of magnesium alloy AZ31B with an Al-based filler metal

详细信息	查看全文 | 推荐本文 |

• 作者：Li Ma^a ; ^{mali2050@emails.bjut.edu.cn} ; Peixin Qiao^a ; Weimin Long^a ; Dingyong He^b ; Xiaoyan Li^b
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：May, 2012
• 卷：37
• 期：Complete
• 页码：465-469
• 文件大小：856 K

摘要

In this paper, wrought magnesium alloy AZ31B sheets were brazed by means of high-frequency induction heating device using a novel Al-based filler metal in argon gas shield condition. The interfacial microstructure, phase constitution and fracture morphology of the brazed joint were studied. The experimental results show that 伪-Mg solid solution and 尾-Mg₁₇Al₁₂ phase were formed in brazing region. Moreover, the homogeneous Mg₃₂(Al, Zn)₄₉ phase in the original Al-based filler metal disappeared entirely after the brazing process due to the fierce alloying between the molten filler metal and the base metal during brazing. Test results show that the shear strength of the brazed joint is 45 MPa. The fracture morphology of the brazed joint exhibits intergranular fracture mode and the crack originates from the hard 尾-Mg₁₇Al₁₂ phase.