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Appl. Sci. 2019, 9(3), 411; https://doi.org/10.3390/app9030411

Porosity Elimination in Modified Direct Laser Joining of Ti6Al4V and Thermoplastics Composites

1
School of Mechanical Engineering and Automation, Beihang University, 37 Xueyuan Road, Beijing 100191, China
2
School of Aeronautic Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing 100191, China
3
School of Science, Harbin Institute of Technology, Shenzhen 518055, China
4
National Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beihang University, 37 Xueyuan Road, Beijing 100191, China
5
Hefei Innovation Research Institute, Beihang University, Hefei 230013, China
*
Authors to whom correspondence should be addressed.
Received: 31 December 2018 / Revised: 20 January 2019 / Accepted: 23 January 2019 / Published: 26 January 2019
(This article belongs to the Special Issue Selected Papers from the NMJ2018)
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Abstract

Hybrid lightweight components with strong and reliable bonding qualities are necessary for practical applications including in the automotive and aerospace industries. The direct laser joining method has been used to produce hybrid joints of Ti6Al4V and glass fiber reinforced polyamide (PA66-GF30). Prior to the laser joining process, a surface texturing treatment is carried out on Ti6Al4V to improve joint strength through the formation of interlock structures between Ti6Al4V and PA66-GF30. In order to reduce the generated micro-pores in Ti6Al4V-PA66-GF30 joints, a modified laser joining method has been proposed. Results show that only very few small micro-pores are generated in the joints produced by the modified laser joining method, and the fracture strength of the joints is significantly increased from 13.8 MPa to 41.5 MPa due to the elimination of micro-pores in the joints. View Full-Text
Keywords: direct laser joining; fracture strength; micro-pores; Ti6Al4V; PA66-GF30 direct laser joining; fracture strength; micro-pores; Ti6Al4V; PA66-GF30
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Wang, H.; Chen, Y.; Guo, Z.; Guan, Y. Porosity Elimination in Modified Direct Laser Joining of Ti6Al4V and Thermoplastics Composites. Appl. Sci. 2019, 9, 411.

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