Performance analysis of carbon fiber reinforced thermalsetting composite-titanium alloy laser joint

ZOU Qi; YE Yiyun; JIAO Junke; WU Zhisheng; XU Zifa; ZHANG Wenwu

doi:10.7527/S1000-6893.2022.25037

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2022 , Vol. 43 >Issue 2: 625037 - 625037

DOI: https://doi.org/10.7527/S1000-6893.2022.25037

Special Topic of Advanced Aeronautical Materials Welding/Joining

Performance analysis of carbon fiber reinforced thermalsetting composite-titanium alloy laser joint

ZOU Qi ,
YE Yiyun ,
JIAO Junke ,
WU Zhisheng ,
XU Zifa ,
ZHANG Wenwu

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1. School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China;
2. Ningbo Institute of Materials Technology & Engineering, Ningbo 315201, China;
3. School of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China;
4. Zhejiang Key Laboratory of Aero Engine Extreme Manufacturing Technology, Ningbo 315201, China

Received date: 2020-12-01

Revised date: 2021-01-05

Online published: 2022-03-04

Supported by

Key Deployment Projects of the Chinese Academy of Sciences (ZDRW-CN-2019-01);The Zhejiang Provincial Key Research and Development (2020C1036); The "Science and Technology Innovation 2025" Major Project of Ningbo City (2019B10074); The Zhejiang Postdoctoral Scientific Research Project (ZJ2019166)

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Abstract

Carbon Fiber Reinforced Thermalsetting (CFRTS) composites and TC4 titanium alloy have high specific strength and rigidity and have obvious lightweight effect, and are widely used in aerospace and new energy automobile manufacturing. To realize high-strength connection between CFRTS and TC4 titanium alloy, this paper introduces an interface compound control process of "laser cleaning+resin filling". To expose the carbon fiber in the CFRTS, a pulsed fiber laser was firstly used to clean the surface of CFRTS, so as to remove the epoxy resin on the surface before laser welding of CFRTS and TC4 titanium alloy. Secondly, a pulsed fiber laser was used to process the surface microtexture of the titanium alloy, so as to increase the contact area between the molten resin and the TC4 titanium alloy during welding and form an "occlusal" structure. Finally, PolyAmide (PA) resin of appropriate thickness was added into the contact surface of the cleaned CFRTS and the titanium alloy for laser-assisted welding. The influence of laser cleaning process on the joint connection strength is studied. A comparative analysis of the CFRTS surface morphology, PA resin filling quality, and joint fracture morphology for different laser cleaning process parameters shows that laser cleaning of CFRTS can significantly enhance the strength of CFRTS-TC4 titanium alloy joint, with the maximum tensile strength reaching 23.77 MPa.

Key words： laser cleaning; laser welding; carbon fiber reinforced thermalsetting composites-titanium alloy heterostructure; connection strength; failure mechanism

Cite this article

ZOU Qi , YE Yiyun , JIAO Junke , WU Zhisheng , XU Zifa , ZHANG Wenwu . Performance analysis of carbon fiber reinforced thermalsetting composite-titanium alloy laser joint[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(2) : 625037 -625037 . DOI: 10.7527/S1000-6893.2022.25037

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