Study on bubble morphology at interface of laser direct joint between carbon fiber reinforced thermoplastic (CFRTP) and titanium alloy

2020 ◽  
Vol 40 (10) ◽  
pp. 868-875
Author(s):  
Hongyan Yang ◽  
Xiaohong Zhan ◽  
Hengchang Bu ◽  
Wanping Ma ◽  
Feiyun Wang
Keyword(s):  
Titanium Alloy ◽  
Carbon Fiber ◽  
Nucleation Site ◽  
Fiber Reinforced ◽  
Alloy Plate ◽  
Air Bubble ◽  
Nucleation Mode ◽  
Carbon Fiber Reinforced ◽  
Bubble Characteristics ◽  
Titanium Alloy Plate

AbstractLaser direct joining of carbon fiber reinforced thermoplastic (CFRTP) composite plate and titanium alloy plate with a thickness of 2 mm was performed with swing laser. Numerous air bubble of submillimeter size were observed inside the fusion zone of CFRTP and titanium alloy at the cross section of the joints. The air bubble characteristics were analyzed based on the morphology and size, while the formation mechanism of air bubble was further elucidated according to the nucleation mode, nucleation site and nucleation position. The results demonstrated that the nucleation modes of air bubble are substantially divided into homogeneous nucleation and heterogeneous nucleation, which is related to the nucleation sites. The nucleation mode presents a crucial factor influencing the position and morphology of air bubble. In addition, the air bubble characteristics are also determined by the clamp pressure and resin flow. The final morphology of air bubble is primarily represented by four typical types.

scholarly journals Robust Heterojunctions of Metallic Alloy and Carbon Fiber-Reinforced Composite Induced by Laser Processing

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7469
Author(s):  
Haipeng Wang ◽  
Peng Yan ◽  
Yingchun Guan
Keyword(s):  
Titanium Alloy ◽  
Carbon Fiber ◽  
Shear Fracture ◽  
Fiber Reinforced ◽  
Cross Sectional ◽  
Fiber Reinforced Composite ◽  
Laser Joining ◽  
Reinforced Composite ◽  
Carbon Fiber Reinforced ◽  
Structure Density

The development of heterojunctions with a strong bonding interface between metals and non-metals has attracted much attention owing to their great potential for use in lightweight structures. Laser joining technology, which emerged as a fast and reliable method, has proven its feasibility and unique advantages in joining metal to polymer matrix composites. Herein, an optimized laser joining configuration has been employed to realize high-quality joining of titanium alloy and carbon fiber-reinforced composite. Cross-sectional microstructures of laser-produced joints reveal that micro-bubbles near the interface have been effectively suppressed and eliminated due to the continual clamping pressure applied to the joined area during the joining process. Tensile tests suggest that the joint strength increases with structure density on a titanium alloy surface, and the greatest fracture strength of joints reaches more than 60 MPa even after experiencing a high–low temperature alternating aging test. For higher structure density (>95%), the joints fail by the fracture of parent plastics near the joined area due to the tensile-loading-induced peel stress at the edges of the overlap region. Otherwise, the joints fail by interfacial shear fracture with breakage when the structure density is lower than 91.5%. The obtained high-performance heterojunctions show great potential in the aerospace and automotive fields.

scholarly journals Bisphenyl-Polymer/Carbon-Fiber-Reinforced Composite Compared to Titanium Alloy Bone Implant

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Richard C. Petersen
Keyword(s):  
Titanium Alloy ◽  
Carbon Fiber ◽  
Polymer Processing ◽  
Fiber Reinforced Composites ◽  
Carbon Fiber Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Implant Surface ◽  
Carbon Fiber Reinforced Composites ◽  
Carbon Fiber Reinforced

Aerospace/aeronautical thermoset bisphenyl-polymer/carbon-fiber-reinforced composites are considered as new advanced materials to replace metal bone implants. In addition to well-recognized nonpolar chemistry with related bisphenol-polymer estrogenic factors, carbon-fiber-reinforced composites can offer densities and electrical conductivity/resistivity properties close to bone with strengths much higher than metals on a per-weight basis.In vivobone-marrow tests with Sprague-Dawley rats revealed far-reaching significant osseoconductivity increases from bisphenyl-polymer/carbon-fiber composites when compared to state-of-the-art titanium-6-4 alloy controls. Midtibial percent bone area measured from the implant surface increased when comparing the titanium alloy to the polymer composite from 10.5% to 41.6% at 0.8 mm,P<10−4, and 19.3% to 77.7% at 0.1 mm,P<10−8. Carbon-fiber fragments planned to occur in the test designs, instead of producing an inflammation, stimulated bone formation and increased bone integration to the implant. In addition, low-thermal polymer processing allows incorporation of minerals and pharmaceuticals for future major tissue-engineering potential.

Experimental Study of Laser Direct Joining of Metal and Carbon Fiber Reinforced Nylon

2014 ◽  
Vol 620 ◽  
pp. 42-48 ◽  
Author(s):  
Chuang Huang ◽  
Xiao Wang ◽  
Yan Wei Wu ◽  
Dong Dong Meng ◽  
Hui Xia Liu
Keyword(s):  
Experimental Study ◽  
Titanium Alloy ◽  
Carbon Fiber ◽  
Joint Strength ◽  
Fiber Reinforced ◽  
Cross Sectional ◽  
Hybrid Joint ◽  
Reinforced Plastic ◽  
Carbon Fiber Reinforced ◽  
Micro Cavity

This paper presents an experimental study to evaluate the feasibility, characteristics and mechanism of laser direct joining between metal and carbon fiber reinforced plastic (PA66CF20). This study presents a method to improve the joint strength of the metal-polymer hybrid joint. The investigation study effects of process parameters (laser power and travelling speed) on the quality of joining joint. Macroscopic morphology of joint and PA66CF20 melting region closed to the interface were observed in this study. XPS analysis shows that Ti-C and Ti-O chemical bonding were produced between titanium alloy and plastic. Cross-sectional photo showed the melted polymer flowed into micro-cavity of metal surface caused by roughness of metal and thus formed mechanical bonding. Finally, the titanium alloy surface was structured in four different surface textures using a pulsed laser. Then the metal was joined with the plastic. The result shows that the joint strength of metal after laser-structured joining with plastic had been improved greatly.

Experimental Study of Thermal Conductivity of Carbon Fiber Reinforced Cement-Based Composites

2012 ◽  
Vol 502 ◽  
pp. 212-216 ◽  
Author(s):  
Ya Dong Bian ◽  
Ran Hai
Keyword(s):  
Thermal Conductivity ◽  
Experimental Study ◽  
Carbon Fiber ◽  
Functional Relationship ◽  
Fiber Reinforced ◽  
Experiment Data ◽  
Air Bubble ◽  
Fitting Method ◽  
Reinforced Cement ◽  
Carbon Fiber Reinforced

This paper studies the carbon fiber weight influencing on the thermal conductivity of carbon fiber reinforced cement-based composites. Experiment results show that the thermal conductivity decreases with the increase of carbon fiber weight. It is because that the air bubble results from the proceeding when the carbon fiber adds into cement-based composites. When the carbon fiber weight is less than 1.0%(by mass), the thermal conductivity decreases significantly. And when the weight is more than 1.0%, the decreasing tendency starts to slow down. Based on the experiment data, the functional relationship between the thermal conductivity and carbon fiber weight is obtained by using the fitting method.

Effect of scanning speed on laser joining of carbon fiber reinforced PEEK to titanium alloy

2020 ◽  
Vol 129 ◽  
pp. 106273 ◽  
Author(s):  
Caiwang Tan ◽  
Jianhui Su ◽  
Baohua Zhu ◽  
Xiaoting Li ◽  
Laijun Wu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Carbon Fiber ◽  
Scanning Speed ◽  
Fiber Reinforced ◽  
Laser Joining ◽  
Carbon Fiber Reinforced
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