Tillmann, W.; Wojarski, L.; Hopmann, C.; Fatherazi, P.; Timmer, C. The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6. Appl. Sci.2023, 13, 13275.
Tillmann, W.; Wojarski, L.; Hopmann, C.; Fatherazi, P.; Timmer, C. The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6. Appl. Sci. 2023, 13, 13275.
Tillmann, W.; Wojarski, L.; Hopmann, C.; Fatherazi, P.; Timmer, C. The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6. Appl. Sci.2023, 13, 13275.
Tillmann, W.; Wojarski, L.; Hopmann, C.; Fatherazi, P.; Timmer, C. The Influence of Low-Pressure Plasma Treatments on the Lap Shear Strength of Laser-Joined AISI 304 Hybrids with Polypropylene and Polyamide 6.6. Appl. Sci. 2023, 13, 13275.
Abstract
This paper investigates if the polar groups induced by a plasma treatment can increase the lap shear strength of laser joined metal and plastic hybrids. Optimal laser joining parameters for cold-rolled AISI304 – Polyamide 6.6 and sandblasted AISI304 - Polypropylene hybrids are developed. The OWRK-method was utilized to identify the change in surface free energy of a low-pressure plasma treatment. Plasma treated samples were joined and tested. The fractured surfaces were investigated via light microscopy and SEM. The arithmetic means of the plasma treated hybrids lap shear strength with polyamide 6.6 varied slightly but all measured values were within the range of the untreated samples. The lap shear strengths of the polypropylene hybrids were significantly reduced. This was attributed to an overaging and the development of low molecular weight oxidized materials which lead to a weak boundary layer. No correlation between surface free energy and the lap shear strength could be found.
Engineering, Industrial and Manufacturing Engineering
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