Microstructure evolution and brazing mechanism of Ti5Si3/Ti3Al composite and Ni-based superalloy joints using Ti-Zr-Cu-Ni filler alloy

作者：Zhang, Tongtong; Yang, Xuesong; Miao, Kesong; Li, Danyang; Chen, Shuai; Cui, Xiping; Huang, Meng; Fan, Guohua^*; Geng, Lin

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2018, 713: 28-34.

DOI：10.1016/j.msea.2017.12.049

• Intermetallics
• Ni-based superalloys
• Brazing
• Microstructure
• Mechanical properties

In this study, reliable brazing of Ti5Si3/Fi(3)Al composite and Inconel 718 alloy was achieved using Ti-33Zr-16Cu-13Ni (wt%) filler alloy. The effect of brazing temperature on interfacial microstructure and mechanical properties of the joints was investigated. The representative microstructure of the joint brazed at 900 degrees C for 5 min was Ti5Si3/Ti3Al substrate/Ti3Al/Ti5Si3 + Ti2Ni + alpha-Ti/Ti2Ni + Fe2Ti/Cr7Ni3 + TiNi3 + Ni(Cr, Fe) solid solution/Inconel 718 substrate. The microstructure evolution mechanism of the joints was proposed based on the experimental analysis. The optimized shear strength of 208 MPa was obtained when brazing at 900 degrees C for 5 min. Additionally, the high temperature shear strength of the joints reached 335 MPa and 365 MPa at 600 degrees C and 650 degrees C, respectively.

• 出版日期2018-1-24
• 单位哈尔滨工业大学