Volume 9, Issue 3, September 2020, Page: 55-58
A Composite Joint Based on Two Kinds of Connection Mechanisms for TA2/T2 Bimetallic Sheets by Laser-TIG Hybrid Weldings
Yan Zhang, State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xinjiang University, Wulumuqi, China
Yidi Gao, State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xinjiang University, Wulumuqi, China
Jianping Zhou, State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xinjiang University, Wulumuqi, China
Daqian Sun, Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun, China
Hongmei Li, Key Laboratory of Automobile Materials, School of Materials Science and Engineering, Jilin University, Changchun, China
Received: Sep. 1, 2020;       Accepted: Sep. 14, 2020;       Published: Oct. 20, 2020
DOI: 10.11648/j.am.20200903.13      View  65      Downloads  37
Abstract
The possibility of two pass welding for TA2/T2 bimetallic sheets joint with laser-TIG hybrid weldings was studied. Laser-gas tungsten arc welding (TIG) hybrid welding of TA2/T2 bimetallic sheets has been applied using BCuP-2 wire as filler metal. A new welding process for TA2/T2 butt joint was introduced on the basis of the controlling the formation of Ti-Cu intermetallics in the joint. One process was two pass welding involving creation of a joint with one laser weld and one TIG weld separated by remaining unmelted TA2/T2 interface. When laser beam on the TA2 side junction surface, T2 would not be completely melted in joint. When TIG welding in groove, the filler metal melted occurred at the TA2 and T2 interfaces. Through two pass welding, the the formation of Ti-Cu intermetallics can be completely avoided during welding. In the paper, microstructure and mechanical characterization of Ti/Cu clad plates laser and arc welded joints were carried out. The unmelted part of TA2/T2 explosive interface acted as a diffusion barrier between Ti and Cu. The unmelted TA2/T2 explosive interface was beneficial to relieve and accommodate the thermal stress. The joint fractured mainly at the brazed weld with the maximum tensile strength of 610 MPa.
Keywords
TA2/T2, Bimetallic Sheets, Welding, Microstructure, Filler Metal, Tensile Strength
To cite this article
Yan Zhang, Yidi Gao, Jianping Zhou, Daqian Sun, Hongmei Li, A Composite Joint Based on Two Kinds of Connection Mechanisms for TA2/T2 Bimetallic Sheets by Laser-TIG Hybrid Weldings, Advances in Materials. Vol. 9, No. 3, 2020, pp. 55-58. doi: 10.11648/j.am.20200903.13
Copyright
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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