期刊
COMPOSITES PART B-ENGINEERING
卷 213, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.108738
关键词
Metal surface laser plastic-covered method; CFRTP-TC4 joint; Joining strength; Fatigue resistance; Failure mechanism; Laser hardening
资金
- Shenzhen Basic Research Project [JCYJ20200109144604020, JCYJ20200109144608205]
- Youth Innovation Promotion Association Chinese Academy of Sciences [2017343]
- National Natural Science Foundation of China [U1609208]
The study investigated the impact of a metal surface laser plastic-covered method and high-speed laser rotational welding technology on the joining quality between CFRTP and TC4 alloy, with significant improvements in joint strength and fatigue resistance observed as a result.
The carbon fiber reinforced thermoplastic composites (CFRTP) and the TC4 alloy are the main materials for aircrafts lightweight manufacturing. The joining quality between them determines the fatigue life of CFRTP-TC4 hybrid structures. To improve the joining quality between the CFRTP and the TC4 alloy, a metal surface laser plastic-covered method was proposed, and a high-speed laser rotational welding technology was applied. The joint strength, the fatigue resistance and the failure mechanism of the joint were investigated. The result showed that the shear strength and the fatigue resistance of the CFRTP-TC4 joint can be improved significantly and a laser harden layer was produced on the TC4 surface. The joint failure fracture was occurred at the interlayer of CFRTP, which indicates that the joint strength is higher than the interlayer bonding strength of CFRTP.
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