| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Biomaterials for 3D Printing
|
| Presentation Title |
From Microstructural Design to Surface Engineering: A Tailored Approach for Improving Fatigue Life of Additively Manufactured Lattice Titanium |
| Author(s) |
Vera Popovich, S.M. Ahmadi |
| On-Site Speaker (Planned) |
Vera Popovich |
| Abstract Scope |
Recently, lattice titanium manufactured by additive manufacturing techniques has been utilized in various applications, including aerospace and biomedical. The effects of topological design and processing on the fatigue behaviour of such metamaterials have been studied and show that the fatigue life of such lattice structures is limited. This study aims to provide an in-depth investigation into the effects of heat treatments, hot isostatic pressing (HIP), sand blasting, and chemical etching on the microstructure, surface morphology and fatigue resistance of titanium metamaterials. It was found that the combination of microstructural design and surface engineering, induced by HIP and sand blasting respectively, allows to increase the endurance limit of these lattice metamaterials by a factor of two. HIP treatment substantially decreased the internal porosity and transformed the microstructure to a more ductile mixture of α+β phases. Sand blasting allowed to eliminate surface imperfections and induce the compressive stress on the struts surface. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |