{"title":"Characteristics and Mechanical Properties of Bypass-Current MIG Welding-Brazed Dissimilar Al\/Ti Joints","authors":"Bintao Wu, Xiangfang Xu, Yugang Miao, Duanfeng Han","volume":98,"journal":"International Journal of Materials and Metallurgical Engineering","pagesStart":338,"pagesEnd":342,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10000885","abstract":"
Joining of 1mm thick aluminum 6061 to titanium TC4
\r\nwas conducted using Bypass-current MIG welding-brazed, and stable
\r\nwelding process and good bead appearance were obtained. The Joint
\r\nprofile and microstructure of Ti\/Al joints were observed by optical
\r\nmicroscopy and SEM and then the structure of the interfacial reaction
\r\nlayers were analyzed in details. It was found that the intermetallic
\r\ncompound layer at the interfacial top is in the form of columnar
\r\ncrystal, which is in short and dense state. A mount of AlTi were
\r\nobserved at the interfacial layer near the Ti base metal while
\r\nintermetallic compound like Al3Ti, TiSi3 were formed near the Al base
\r\nmetal, and the Al11Ti5 transition phase was found in the center of the
\r\ninterface layer due to the uneven distribution inside the weld pool
\r\nduring the welding process. Tensile test results show that the average
\r\ntensile strength of joints is up to 182.6 MPa, which reaches about
\r\n97.6% of aluminum base metal. Fracture is prone to occur in the base
\r\nmetal with a certain amount of necking.<\/p>\r\n","references":"[1] Rendigs K H. Aluminium structures used in aerospace status and\r\nprospects. Materials Science Forum, 1997, 242:11-24.\r\n[2] Faller K, Froes FH. The use of titanium in family auto-mobiles: current\r\ntrends. Journal of Metals, 2001, 53(4):27-8.\r\n[3] Lan Tian, Kreimeyer M, Florian W, Frank V. Laser processing of\r\naluminum\u2013titanium tailored blanks. Optics and Lasers in Engineering,\r\n2005, 43:1021-35.\r\n[4] Lv Shixiong, Cui Qinglong, Huang Yongxian, et al. Analysis of interface\r\nfracture behavior of arc fusion-brazed joint between titanium and\r\naluminum dissimilar alloys (J). Transactions of the China Welding\r\nInstitution, 2013, 34(6): 33-37.\r\n[5] Chen YC, Nakata K. Microstructural characterization and mechanical\r\nproperties in friction stir welding of aluminum and titanium dissimilar\r\nalloys (J). Materials & Design, 2009, 30:469-74.\r\n[6] Yugang Miao, Bintao Wu, Xiangfang Xu, Duanfeng Han. Microstructure\r\nand mechanical properties of bypass-current MIG welding-brazing for\r\nmagnesium \/ steel dissimilar metals (J). Acta Metallurigica Sinica, 2014,\r\n(10.1007\/s40195-014-0118-3).\r\n[7] Shi Yu, Wang Zhao, Huang Jiankang, et al. Study on microstructure of\r\nfusing-brazing joint of aluminum to galvanized steel by pulsed DE-MIG\r\nwelding (J). Transactions of the China Welding Institution, 2013, 34(5):\r\n1-4.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 98, 2015"}