Effect of Additive Manufactured Metallic Structures on Laser-Based Thermal Joining of Thermoplastic Metal Hybrids

Abstract:

In future, the use of tailored multi material parts consisting of thermoplastics and metals will increase especially in the field of automotive applications based on the pursuit of lightweight design. This provides completely new demands on automated manufacturing because dissimilar materials have to be joined reliably. A promising approach is the thermal joining by laser radiation which enables a non-contact, automated and reproducible production of thermoplastic metal hybrids. Thereby, laser radiation heats the metal and through heat conduction the thermoplastic melts and wets the metal surface. The surface topography of the metallic joining partner plays an important role for the strength of the hybrid joint. In this paper, a novel approach for the fast and flexible fabrication of part-adapted surface structures by means of laser cladding with powder injection is investigated. The aim of the performed experiments is to find out how the geometry and arrangement of additive manufactured line-like metallic structures affect the strength of the dissimilar joint. Therefore, the height and width of the structures are varied. The structure geometries are investigated by microscopy of cross-sections and laser-scanning microscope measurements. As substrate and powder material stainless steel is used. Finally, the metallic samples are joined with polyamide 12 by means of laser radiation and mechanically analyzed by tensile shear tests.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 777-782
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.777
• Online since: July 2015
• Authors: Philipp Amend*, Oliver Hentschel, Chritian Scheitler, Andrey Igorevich Gorunov, Michael Schmidt
• Keywords: Laser Cladding, Laser Engineered Net Shaping (LENS), Laser Metal Deposition (LMD), Laser-Based Thermal Joining, Thermoplastic Metal Hybrids

References

[1] Neitzel, M.; et al.: Handbuch Verbundwerkstoffe. Werkstoffe, Verarbeitung, Anwendung. Hanser, (2004).

DOI: 10.3139/9783446436978.fm

[2] Ehrenstein, G. W.: Faserverbund-Kunststoffe. München, Hanser Verlag, (2006).

[3] Makoto, H.; et al.: Joining mechanism between aluminum and polypropylene resin using insert materials by laser radiation. In: Transactions of JWRI, Vol. 39, Issue 2 (2010), pp.343-345.

[4] Bauernhuber; A.; et al.: Laser assisted joining of metal pins and thin plastic sheets. In: Physics Procedia, 39 (2012), pp.108-116.

DOI: 10.1016/j.phpro.2012.10.020

[5] Cenigaonaindia, A.: Novel strategies for laser joining of polyamide and AISI 304. In: Physics Procedia, 39 (2012), pp.92-99.

DOI: 10.1016/j.phpro.2012.10.018

[6] Wahba, M.; et al.: Laser direct joining of AZ91D thixomolded Mg alloy and amorphous polyethylene terephthalate. In: Journal of Materials Processing Technology, 211 (2011), pp.1166-1174.

DOI: 10.1016/j.jmatprotec.2011.01.021

[7] Bergmann, J. -P.; et al: Potential of Laser manufactured Polymer-metal hybrid Joints. In: Physics Procedia, 39 (2012), pp.84-91.

DOI: 10.1016/j.phpro.2012.10.017

[8] Bergmann, J. -P.: Laser joining of endless long fiber-reinforced thermoplastics with aluminum. In: Proceedings of ICALEO 2013, pp.140-146, paper #601.

[9] Roesner, A.; et al.: Long term stability of laser joined plastic metal parts. In: Physics Procedia, 41 (2013), pp.169-171.

DOI: 10.1016/j.phpro.2013.03.066

[10] Roesner, A.; et al.: Laser Assisted Joining of Plastic Hybrids. In: Physics Procedia, 12 B (2011), pp.370-377.

DOI: 10.1016/j.phpro.2011.03.146

[11] Devrient, M.; et al.: Laser-based joining of three-dimensional thermoplastic parts and thermoplastic aluminum hybrids. In: Proceedings of ICALEO 2013, pp.147-159, paper #602.

DOI: 10.2351/1.5062864

[12] Amend, P.; et al.: Thermal joining of thermoplastics metal hybrids by means of mono- and polychromatic radiation. In: Physics Procedia, 41(2013), pp.98-105.

DOI: 10.1016/j.phpro.2013.03.056