Experimental Study on Microstructure and Mechanical Properties of Dissimilar Cu/Al Welded by Hybrid Coaxial Blue-Ir Laser

作     者：Zhang, Mingjun Zhang, Yuxuan Zhang, Jian Wang, Hailong Li, Heqing Cheng, Bo Wu, Xiang Zhou, Dianwu Mao, Cong Hu, Yongle Li, Wen 

作者机构：Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment Changsha University of Science and Technology Changsha410114 China Institute of Metals College of Materials Science and Engineering Changsha University of Science & Technology Changsha410114 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China Hunan SANY Tower Lifting Machinery Co. Ltd. Changsha410600 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Microstructure 

摘      要：A hybrid blue-infrared (IR) laser is adopted to weld 5052 Al with T2 Cu to investigate the impact of processing parameters on the quality of Cu/Al overlap joints in terms of microstructures, mechanical properties, and failure modes. The experiments show that combining an infrared laser and a blue laser has enlarged an opening channel of welds and stabilized the convention on edge of the weld pool. This eases the removals of bubbles and prevents the formations of pores. When a hybrid coaxial blue-IR laser with a power less than 500 W is used, the weld strengths of the specimens are increased significantly, and the plasticity is decreased slightly in comparison with the specimens welded by an infrared laser. When the power of the blue laser is increased to 800 W, the strength and plasticity of a lapped weld are decreased significantly. Moreover, the joints only welded by an infrared laser are fractured in a mixed fracture mode. When the blue laser power of the hybrid coaxial blue-IR laser is lower than 500 W, the weld is ruptured by a ductile fracture. However, a brittle fracture is observed as the blue laser power exceeding 800 W. © 2024, The Authors. All rights reserved.