Investigation of residual stresses in polypropylene using hot plate welding

Wuebbeke A, Schoeppner V, Geissler B, Schmidt M, Magnier A, Wu T, Niendorf T, Jakob F, Heim HP (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Welding in the World Springer

Book Volume: 64

Pages Range: 1671-1680

Journal Issue: 10

DOI: 10.1007/s40194-020-00939-7

Abstract

During the cooling process of the molten material, residual stresses appear because the reduced volume of the cooled material cannot fully fill the space formerly occupied by the molten material. The morphology in and around the weld is formed by different factors depending on the material and process parameters. Different morphological structures relate to different mechanical properties. The process parameters and the welding results including morphology and residual stress are linked together. In this article, residual stresses and the mechanical properties of a hot-plate-welded polypropylene specimen with 0.1 wt.-% content of carbon black are investigated in relation to the morphology. Different measurement positions and joining displacements of parts to be joined result in different residual stress states and morphological structures. The higher the joining displacement, the higher the residual stress. Investigations of the morphology show a relation between the size of the alpha spherulites and the joining displacement. Diffractions patterns of wide-angle X-ray scattering (WAXS) are not able to resolve the beta phase of the specimen.

Authors with CRIS profile

Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Involved external institutions

Universität Kassel DE Germany (DE) Universität Paderborn DE Germany (DE) Bayerisches Laserzentrum gemeinnützige Forschungsgesellschaft mbH (BLZ) DE Germany (DE)

How to cite

APA:

Wuebbeke, A., Schoeppner, V., Geissler, B., Schmidt, M., Magnier, A., Wu, T.,... Heim, H.-P. (2020). Investigation of residual stresses in polypropylene using hot plate welding. Welding in the World, 64(10), 1671-1680. https://doi.org/10.1007/s40194-020-00939-7

MLA:

Wuebbeke, Andrea, et al. "Investigation of residual stresses in polypropylene using hot plate welding." Welding in the World 64.10 (2020): 1671-1680.

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