期刊
CHINESE JOURNAL OF AERONAUTICS
卷 34, 期 5, 页码 103-114出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2020.08.017
关键词
Carbon fiber reinforced thermoplastic composite (CFRTP); Grid depth; Laser joining; Laser texturing; TC4
资金
- National Natural Science Foundation of China [51875129]
By laser texturing the TC4 surface, the wettability of molten CFRTP was significantly improved and the shear force of CFRTP/TC4 joints was increased. When the depth of the grid exceeded 100 micrometers, the contact angle increased and led to a gradual decrease in shear force, indicating incomplete filling.
Grid pattern was textured on Ti-6Al-4V alloy (TC4) substrate surface by nanosecond laser system. Laser joining of carbon fiber reinforced thermoplastic composite (CFRTP) to TC4 joints were performed, and the effect of texture grid depth was investigated. The contact angle of molten CFRTP on textured TC4 surface was measured and the tensile-shear force was tested. The fracture surface and interface morphology were observed. The results indicated that the wettability of molten CFRTP on TC4 surface improved remarkably after laser textured TC4. Shear force of CFRTP/TC4 joints was increased by 156% after laser textured TC4 surface. When the depth of grid was deeper than 100 mu m, contact angle increased and incomplete filling of molten CFRTP in grid occurred, the shear force thus decreased gradually. Resin-carbon fibers mixture was adhered on the fracture surface of TC4, and the variation tendency of adhesion ratio was consistent with that of shear force. TC4 matrix was exfoliated from substrate and adhered at the fracture surface of CFRTP, indicating stronger mechanical interlocking occurred at the joining interface after laser textured TC4 surface. Beside mechanical interlocking, compound layer consisted of CTi0.42V1.58 carburization phase was also confirmed at interface, suggesting that chemical bonding also occurred at the joining interface. (C) 2020 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据