Interface characterization of hybrid biocompatible fiber-metal laminates after laser-based surface treatment. (1st February 2022)

• Record Type: Journal Article
• Authors: Trauth, A.; Lohr, C.; Lallinger, B.; Weidenmann, K.A.
• Is Part Of: Composite structures. Volume 281(2022)
• Publication Date: 2022-02-01
• Subjects: Fiber-metal laminates -- Interface characterization -- Self-reinforced polylactide -- Laser-based surface treatment -- Hybrid laminate; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2021.115054
• Languages: English
• ISSNs: 0263-8223

Abstract

Highlights: A laser-based surface pre-treatment allowed to manufacture biocompatible fiber-metal laminates by means of hot pressing. Intensive parameter studies enabled to define appropriate parameter-sets to achieve suitable surface morphologies for joining. Exposed to shear loads failure occurred partly at the interface and partly within the polymeric component. Abstract: Fiber metal-laminates, which are based on titanium and a self-reinforced biocompatible polylactide (srPLA), are a promising approach to extend the range of materials for medical implants. A laser-based surface pre-treatment results in a strong bond between the metallic and polymeric part that are joined via hot-pressing. An extensive parameter study supported by scanning electron microscopy of the titanium sheets as well as shear edge testing with the hybrid material, allowed for a direct definition of suitable laser structures for the pre-treatment of the metallic component. A post-mortem optical examination also gave a qualitative insight into the failure mechanisms. It was possible to show that a laser induced pre-treatment significantly enhanced interface strength compared to an untreated surface with the considered testing method. Hence, a laser-induced surface treatment is a suitable pre-treatment process for the selected material combination, titanium and self-reinforced polylactide (PLA), to achieve increased interface strength.