文献类型：期刊文献

英文题名：Microstructure and Mechanical Properties of Laser Oscillated Welded DP780 Dual Phase Steel and 5083 Aluminium Alloy: Scanning Oscillations at the Same Energy Density

作者：Ba, Y.[1,2];Shi, W-Q[1];Han, S-G[2];Huang, J-Y[1];Xie, Y-P[1];Huang, J.[1];He, K-F[3]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, 1 Haida Rd, Zhanjiang 524088, Guangdong, Peoples R China;[2]Guangdong Acad Sci, China Ukraine Inst Welding, 100 Xianlie Cent Rd, Guangzhou 510650, Guangdong, Peoples R China;[3]Foshan Univ, Sch Mechatron Engn & Automat, 18 Jiangwan 1st Rd, Foshan 528225, Guangdong, Peoples R China

年份：2021

卷号：51

期号：1-5

起止页码：299

外文期刊名：LASERS IN ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000718024900019)、、EI(收录号：20221712030362)、Scopus(收录号：2-s2.0-85121695880)、WOS

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 62073089) , the Special Fund for Key Projects of Colleges and Universities in Guangdong Province (Grant No. 2020ZDZX2061) , the Guangdong Academy of Sciences Foundation (Grant Nos. 2019GDA-SYL-0501011 and 2018GDASCX-0803) and the Guangzhou Economic and Technological Development Zone Science and Technology Fund (Grant No. 2019GH19) . The authors would like to thank Wen Qing Shi and Shan Guo Han for their help in the writing and proofreading of this article, as well as Mr. David Couzens (Senior American Copyeditor) from New Bridge Transla-tion Company, Ltd. for his professional copyediting services.

语种：英文

外文关键词：Disk laser; DP780 dual phase steel; 5083 Al; laser welding; laser oscillating welding; steel-Al dissimilar joints; macrostructure; microstructure; mechanical properties

外文摘要：Steel and Al exhibit large differences in their physical properties and chem-ical compositions, making welding them together difficult. To obtain high quality steel-Al joints, three laser welding modes were used to perform lap joint experiments on two metals: DP780 dual phase steel; and 5083 Al alloy. The macroscopic morphology, microstructure and mechanical prop-erties of the DP780 dual phase steel-5083 Al alloy joints formed with these different laser welding modes were investigated. The results show that laser oscillation welding can effectively improve the formation of the weld and reduce cracks, spatter and other defects. Laser oscillation welding through the stirring of the molten pool can distribute heat uniformly throughout the molten pool, reduce the content of ferrite in the welded joint and promote the mixing of liquid DP780 dual phase steel and 5083 Al alloy, effectively reducing the generation of an Al-rich intermetallic compound (IMC). After laser pendulum welding the microhardness of the DP780 dual phase steel-side joint was increased significantly by a factor of more than 11/2 times over that of the base material (BM). The maximum shear strength of the joint reached 114 N/mm, an increase of 56% compared to that achieved with conventional laser welding.