Ti-16.5Zr-13.5Cu-8.5Ni (wt.%) as a filler and brazing process as 950 °C/60 min were supplied in this study for brazing cast TiAl alloys with fully lamella structure. The interface microstructure and element diffusion were analyzed and measured by SEM, EBSD, and EPAM. And the mechanical properties of joints were evaluated. The sound joints were achieved with strength as 575 MPa at room temperature and remained as 410 MPa and 385 MPa in average at 700 °C and 760 °C, respectively. It was attributed to lots of fine grains with soft orientation as BCC [120] in the joint to the tensile direction. It was found that the fracture happened in the local zones with very large grains and the extreme misorientation between grains in the joint. Even though most grains as Ti₃Al phase were found in the joint, there was no sign indicating the formed IMC related to the fracture.

Ť I-16.5Zr-13.5Cu-8.5Ni（重量％）作为填料和如950℃/ 60分钟在本研究中提供的用于钎焊的TiAl铸件合金充分薄片状结构的钎焊过程。通过SEM，EBSD和EPAM分析和测量界面的微观结构和元素扩散。并评估了接头的机械性能。室温下的强度为575 MPa，在700°C和760°C的平均强度分别保持在410 MPa和385 MPa。这归因于许多在拉伸方向的接头处具有软取向的细晶粒，如BCC [120]。发现断裂发生在具有非常大晶粒的局部区域中，并且在接合处的晶粒之间具有极端的取向错误。即使大多数晶粒为Ti ₃在关节处发现Al相，没有迹象表明形成的IMC与骨折有关。