Formation Mechanism of Porosity in Laser Welding-Brazing of Ti/Al Dissimilar Alloys

被引：0

作者：

Chen Shuhai ^{[1
]}

Li Liqun ^{[1
]}

Chen Yanbin ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding Prod Technol, Harbin 150001, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2010年 / 39卷 / 01期

关键词：

laser welding-brazing; Ti/Al dissimilar alloys; porosity tendency; viscosity; ALUMINUM; TITANIUM; JOINT;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The laser welding-brazing experiment of Ti/Al dissimilar alloys was performed with rectangular spot CO2 laser as heat resource and AlSi12 as the filler wire. It is found that the porosity in the seam is a main factor for weak joint. The results indicate that the gasification of element Mg causes the formation of porosity during the welding. The offset of the laser beam toward Ti alloy and heat input markedly influence the formation of the porosity. In general no porosity is observed in the seam when the length of claviform intermetallic compound is less than 10 mu m. Moreover, the microstructure in the seam plays a key role in the diameter of the pore.

引用

页码：32 / 36

页数：5

共 13 条

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