Joining phenomena and tensile strength of friction welded joint between pure aluminum and pure copper

Mechanical Engineering Journal

Akiyoshi FUJI¹  Masaaki KIMURA²  Masahiro KUSAKA²  Koichi KAIZU²  Yuusuke INUI³ 

[1] Department of Mechanical Engineering, Faculty of Engineering, Kitami Institute of Technology;Department of Mechanical and System Engineering, Graduate School of Engineering, University of Hyogo;Graduate Student, University of Hyogo;

关键词: friction welding;    pure aluminum;    pure copper;    joining phenomena;    tensile strength;    friction welding condition;    not-joined region;    intermetallic compound;   

DOI  :  10.1299/mej.14-00328

来源: DOAJ

【 摘 要 】

This paper describes the joining phenomena and the tensile strength of friction welded joint between type 1070 pure aluminum (CP-Al) and oxygen free copper (OFC). When the joint was made at a friction pressure of 30 MPa with a friction speed of 27.5 s-1, the upsetting (deformation) occurred at the CP-Al side. When the joint was made at a friction time of 2.0 s, the whole weld interface on the OFC side had the transferred CP-Al, and it was obtained approximately 30% joint efficiency. Then, the joint efficiency increased with increasing friction time, and it was obtained approximately 63% joint efficiency at a friction time of 12.0 s. The joint fractured at the weld interface, which had a CP-Al adhering to the weld interface on the OFC side. When the joint was made with friction times of 2.0 s and 6.0 s, the joint efficiency increased with increasing forge pressure and then the joint was obtained the CP-Al side fracture at a forge pressure of 135 MPa or higher. However, the joint did not achieve 100% joint efficiency because the adjacent region of the weld interface at the CP-Al side was softened. In addition, the joint at a friction time of 2.0 s had no intermetallic compound (IMC) layer at the weld interface although the not-joined region was slightly observed. On the other hand, the joint at a friction time of 6.0 s did not have the not-joined region at the weld interface although the IMC layer was slightly observed. In conclusion, to obtain higher joint efficiency with fracture on the CP-Al side, the joint should be made with higher forge pressure, and with the suitable friction time at which the entire weld interface of the OFC side had the transferred CP-Al.

【 授权许可】

Unknown