Strength of Materials

, Volume 50, Issue 5, pp 752–763 | Cite as

Assessment of the Microstructure and Mechanical Properties of a Laser-Joined Carbon Fiber-Reinforced Thermosetting Plastic and Stainless Steel

  • L. Y. ShengEmail author
  • J. K. Jiao
  • C. Lai

The thermosetting plastic and stainless steel were joined with a fiber laser. The influence of processing parameters on the joint was studied. The laser scanning on stainless steel is shown to result in the formation of the heat-affected and fusion zones. In the first zone, lathy ferrite precipitates along the boundary, which modifies austenite, while in the second zone, ferrite forms the skeleton structure and separates austenite into a small cellular structure. The laser joining improves the microstructure of both zones. With an increase in the laser scanning speed and power, the shear strength of the stainless steel/plastic joint first increases and then decreases. A low laser scanning speed or high laser power would overheat polyphenylene sulphide and lead to its decomposition. Those factors would also reduce heat transfer and lead to its insufficient melting. The stainless steel/plastic joint acquires a maximum shear strength at a laser scanning speed of 4–5 mm/s and laser power of 320-350 W.


laser joining carbon fiber-reinforced thermoplastic stainless steel microstructure shear strength bonding interface 



The authors are grateful to the support of Shenzhen Basic Research Projects (JCYJ20150529162228734, JCYJ20160427170611414, and JCYJ20170306141506805).


  1. 1.
    X. L. Zhao and L. Zhang, “State-of-the-art review on FRP strengthened steel structures,” Eng. Struct., 29, 1808–1823 (2007).CrossRefGoogle Scholar
  2. 2.
    F. Lambiase, S. Genna, C. Leone, and A. Paoletti, “Laser-assisted direct-joining of carbon fibre reinforced plastic with thermosetting matrix to polycarbonate sheets,” Opt. Laser Technol., 94, 45–58 (2017).CrossRefGoogle Scholar
  3. 3.
    G. Williams, R. Trask, and I. Bond, “A self-healing carbon fiber reinforced polymer for aerospace applications,” Compos. Part A-Appl. S., 38, No. 6, 1525–32 (2007).CrossRefGoogle Scholar
  4. 4.
    A. Mayyas, A. Qattawi, M. Omar, and D. Shan, “Design for sustainability in automotive industry: a comprehensive review,” Renew. Sust. Energ. Rev., 16, No. 4, 1845–62 (2012).CrossRefGoogle Scholar
  5. 5.
    Z. Zhang, J. Shan, X. Tan, and J. Zhang, “Improvement of the laser joining of CFRP and aluminum via laser pre-treatment,” Int. J. Adv. Manuf. Technol., 90, Nos. 9–12, 3465–3472 (2017).CrossRefGoogle Scholar
  6. 6.
    G. Marannano and B. Zuccarello, “Numerical experimental analysis of hybrid double lap aluminum-CFRP Joints,” Compos. Part B-Eng., 71, 28–39 (2015).CrossRefGoogle Scholar
  7. 7.
    J. Kweon, J. Jung, T. Kim, et al., “Failure of carbon composite-to-aluminum joints with combined mechanical fastening and adhesive bonding,” Compos. Struct., 75, 192–198 (2006).CrossRefGoogle Scholar
  8. 8.
    P. P. Camanho, A. Fink, A. Obst, and S. Pimenta, “Hybrid titanium-CFRP laminates for high-performance bolted joints,” Compos. Part A-Appl. S., 40, No. 12, 1826–1837 (2009).CrossRefGoogle Scholar
  9. 9.
    S. M. Goushegir, “Friction spot joining (FSPJ) of aluminum-CFRP hybrid structures,” Weld World, 60, No. 6, 1073–1093 (2016).CrossRefGoogle Scholar
  10. 10.
    J. Min, Y. Li, J. Li, et al., “Friction stir blind riveting of carbon fiber-reinforced polymer composite and aluminum alloy sheets,” Int. J. Adv. Manuf. Technol., 76, No. 5, 1403–1410 (2015).CrossRefGoogle Scholar
  11. 11.
    S. Katayama and Y. Kawahito, “Laser direct joining of metal and plastic,” Scripta Mater., 59, 1247–1250 (2008).CrossRefGoogle Scholar
  12. 12.
    X. Tan, J. Shan, and J. Ren, “Effects of Cr plating layer on shear strength and interface bonding characteristics of mild steel/CFRP joint by laser heating,” Acta Metall. Sin., 49, 751–756 (2013).CrossRefGoogle Scholar
  13. 13.
    X. H. Tan, J. Zhang, J. G. Shan, et al., “Characteristics and formation mechanism of porosities in CFRP during laser joining of CFRP and steel,” Compos. Part B-Eng., 70, 35–43 (2015).CrossRefGoogle Scholar
  14. 14.
    L. Y. Sheng, F. Yang, T. F. Xi, et al., “Influence of heat treatment on interface of Cu/Al bimetal composite fabricated by cold rolling,” Compos. Part B-Eng., 42, No. 6, 1468–1473 (2011).CrossRefGoogle Scholar
  15. 15.
    K. W. Jung, Y. Kawahito, and S. Katayama, “Laser direct joining of carbon fibre reinforced plastic to stainless steel,” Sci. Technol. Weld Joint, 16, No. 8, 676–80 (2011).CrossRefGoogle Scholar
  16. 16.
    J. Jiao, Q. Wang, F. Wang, et al., “Numerical and experimental investigation on joining CFRTP and stainless steel using fiber lasers,” J. Mater. Process. Tech., 240, 362–369 (2017).CrossRefGoogle Scholar
  17. 17.
    J. Jiao, Z. Xu, Q. Wang, et al., “CFRTP and stainless steel laser joining: Thermal defects analysis and joining parameters optimization,” Opt. Laser Technol., 103, 170–176 (2018).CrossRefGoogle Scholar
  18. 18.
    H. Di, Q. Sun, X. Wang, and J. Li, “Microstructure and properties in dissimilar/ similar weld joints between DP780 and DP980 steels processed by fiber laser welding,” J. Mater. Sci. Technol., 33, No. 12, 1561–1571 (2017).CrossRefGoogle Scholar
  19. 19.
    L. J. Wang, L. Y. Sheng, and C. M. Hong, “Influence of grain boundary carbides on mechanical properties of high nitrogen austenitic stainless steel,” Mater. Design, 37, 349–355 (2012).CrossRefGoogle Scholar
  20. 20.
    M. Alali, I. Todd, and B. P. Wynne, “Through-thickness microstructure and mechanical properties of electron beam welded 20 mm thick AISI 316L austenitic stainless steel,” Mater. Design, 130, 488–500 (2017).CrossRefGoogle Scholar
  21. 21.
    L. Y. Sheng, F. Yang, T. F. Xi, et al., “Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy,” Mater. Res. Innov., 17, No. S1, 101–106 (2013).CrossRefGoogle Scholar
  22. 22.
    L. Y. Sheng, F. Yang, T. F. Xi, et al., “Microstructure evolution and mechanical properties of Ni3Al/Al2O3 composite during self-propagation high-temperature synthesis and hot extrusion,” Mater. Sci. Eng. A, 555, 131–138 (2012).CrossRefGoogle Scholar
  23. 23.
    L. Y. Sheng, B. N. Du, B. J. Wang, et al., “Hot extrusion effect on the microstructure and mechanical properties of an Mg–Y–Nd–Zr alloy,” Strength Mater., 50, No. 1, 184–192 (2018).CrossRefGoogle Scholar
  24. 24.
    L. Y. Sheng, W. Zhang, J. T. Guo, et al., “Microstructure and mechanical properties of Ni3Al fabricated by thermal explosion and hot extrusion,” Intermetallics, 17, No. 7, 572–577 (2009).CrossRefGoogle Scholar
  25. 25.
    L. Sheng, F. Yang, T. Xi, et al., “Microstructure and room temperature mechanical properties of NiAl–Cr (Mo)–(Hf, Dy) hypoeutectic alloy prepared by injection casting,” Trans. Nonferrous Met. Soc. China, 23, No. 4, 983–990 (2013).CrossRefGoogle Scholar
  26. 26.
    K. W. Jung, Y. Kawahito, and S. Katayama, “Laser direct joining of carbon fiber-reinforced plastic to stainless steel,” Sci. Technol. Weld Joint, 16, 676–680 (2011).CrossRefGoogle Scholar
  27. 27.
    M. Wahba, Y. Kawahito, and S. Katayama, “Laser direct joining of AZ91D thixomolded Mg alloy and amorphous polyethylene terephthalate,” J. Mater. Process. Tech., 211, No. 6, 1166–1174 (2011).CrossRefGoogle Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Shenzhen InstitutePeking UniversityShenzhenChina
  2. 2.Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboChina

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