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

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Strength of Materials Aims and scope

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.

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Acknowledgments

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

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Authors and Affiliations

  1. Shenzhen Institute, Peking University, Shenzhen, China

    L. Y. Sheng & C. Lai

  2. Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China

    J. K. Jiao

Authors
  1. L. Y. Sheng
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  2. J. K. Jiao
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  3. C. Lai
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Corresponding author

Correspondence to L. Y. Sheng.

Additional information

Translated from Problemy Prochnosti, No. 5, pp. 76 – 88, September – October, 2018.

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Sheng, L.Y., Jiao, J.K. & Lai, C. Assessment of the Microstructure and Mechanical Properties of a Laser-Joined Carbon Fiber-Reinforced Thermosetting Plastic and Stainless Steel. Strength Mater 50, 752–763 (2018). https://doi.org/10.1007/s11223-018-0020-8

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  • DOI: https://doi.org/10.1007/s11223-018-0020-8

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