中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 32 No. 2 February 2022 |
（1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
2. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China）
Abstract:The Cf/Al composites were joined to the TC4 alloy via the laser-induced combustion joining method. The exothermic reaction of the interlayer provided the required energy for the joining process. By combining the theoretical calculation and experiment, the chemical composition of the Ni-Al-Zr interlayer was designed. The microstructure and mechanical properties of the joint were investigated. The results show that the addition of Zr slightly weakened the combustion reaction of exothermic interlayer but played a key role in the successful joining. Ni-Al-Zr interlayer reacted with substrates, forming a TiAl3 layer adjacent to TC4 alloy and NiAl3, Ni2Al3 layers adjacent to the Cf/Al composites. Zr content dominated the microstructure and shear strength of the joint. When the Zr content was 5 wt.% under the joining pressure of 2 MPa, the joint had a maximum shear strength of 19.8 MPa.
Key words: Cf/Al composites; TC4 alloy; combustion joining; interfacial microstructure; shear strength
