Abstract: The friction stir brazing (FSB) were conducted to achieve the connection of TC4 and Al6082 by adding various thickness of brazing filler Zn. Then, the tensile and shear tests of the welded Ti/Al joint were carried out, and comparison was made on the shear strength of Ti/Al joint with various thickness of brazing filler Zn. Scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) were employed to observe and analyze the cross-section microstructure of the joints. The differences of the cross section microstructure and fracture modes of the Ti/Al joint with various thicknesses of brazing filler Zn were distinguished. Furthermore, the temperature distribution of the Ti/Al joint under the optimum FSB parameters was obtained. It could be found from the research results that the Ti/Al joint with 0.05 mm thick brazing filler Zn exhibit the highest sharing strength (154 MPa), about 75% of that of the base metal. The intermetallic compound AlZn formed in the central region of the interfacial layer, and there was scarcely any Ti-Al intermetallic compound. The fracture mode of Ti/Al joint was defined as mixed fracture of brittle and ductile fracture. Regarding to the temperature distribution on the Ti/Al joint, the peak temperature first rose and then dropped as the location gradually away from the weld center, and the forward side held higher temperature than the backward side. The formation order of the intermetallic compound at the Ti-Zn-Al interface was TiAl2, TiAl3, TiAl and AlZn under the highest temperature of 260 ℃.
Chen Yuhua,Ni Quan,Huang Chunping, et al. Transactions of the China Welding Institution,2011, 32(9),73(in Chinese).陈玉华,倪泉,黄春平.焊接学报,2011,32(9),73.
[7]
Aonuma M, Nakata K. Materials Transactions, 2011, 52(5),948.
[8]
Dressler U, Biallas G, Alfaro Mercado U. Materials Science and Engineering A, 2009, 526(1):113.
[9]
Chen Y C, Nakata K. Transactions of the China Welding Institution, 2009, 30(3),469.
[10]
Zhang Zhenhua, Shen Yifu, Hu Weiye, et al. Transactions of the China Welding Institution, 2016,37(5),28(in Chinese).张振华,沈以赴,胡伟业,等.焊接学报,2016,37(5),28.
[11]
Mishra R S, Ma Z Y. Materials Science and Engineering R, 2005, 50,178.
[12]
Dressler U, Biallas G, Mercado U A. Materials Science and Engineering A, 2009, 526(1-2),113.
[13]
Fuji A, Ikeuchi K, Sato Y S, et al. Science and Technology of Welding and Joining, 2004, 9, 507.
[14]
Chen Yukun, Ni Quan, Ke Liming. Transactions of Nonferrous Metals Society of China, 2012, 22(2),299(in Chinese). 陈宇坤,倪泉,柯黎明.中国有色金属学报,2012,22(2),299.
[15]
张贵峰,苏伟,张建勋等.中国专利,200910021918.3,2009.
[16]
Zhang Xin. Effects of intermediate layer material on microstructure and properties of friction stir welding joints of Ti/A1 heterogeneous metals. Master’s Thesis, Nanchang University of Aeronautics and Astronautics,2015(in Chinese). 张鑫.中间层材料对Ti/A1异种金属搅拌摩擦焊接头组织及性能的影响.硕士学位论文,南昌航空大学,2015.
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2019, Vol. 33 
