THE FRACTURE BEHAVIOR ANALYSIS ON BRAZED JOINT OF TI-6AL-4V AND 1CR18NI9TI TUBES
Using the copper-base and silver-base brazing filler metals, the experimental study on high frequency induction brazing of thin-wall and small diameter dissimilar metals tubes,such as Ti-6Al-4V and 1Cr18Ni9Ti is conducted. Their qualities and properties are largely superior to the bolt connection tubes structures. The static tensile test results indicate that all the joints brazed by silver-base brazing filler metal have failed on 1Cr18Ni9Ti base metal, and their mechanical properties are slightly better than those using copper-base filler metal. It is found from the microstructures observation after tensile tests that, all the cracks in the joint brazed by silver-base brazing filler metal germinated and propagated in the brazing seam, and then stoped when they met with the interfaces. The cracks in the joint brazed by copper-base filler metal germinated in three locations: the boundary of two phases in the brazing seam, the interface between brazing seam and Titanium alloy, the interface between brazing seam and Stainless Steel, and then propagated in the brazing seam. The crack driving force consisted mainly of the static tensile load and the mismatch behaviour of dissimilar metals brazed joint. And the crack extension resistant force is related to the microstructures in the brazed joint.
Qu Wenqing Zhang Lei Zhuang Hongshou
School of Mechanical Engineering and Automation, BeiHang University, Beijing, 100083, PR China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）