Journal ArticleDOI
Surface modification of Ti6Al4V open porous structures produced by additive manufacturing
Grzegorz Pyka,Andrzej Burakowski,Greet Kerckhofs,Maarten Moesen,Simon Van Bael,Jan Schrooten,Martine Wevers +6 more
TLDR
In this paper, a novel surface modification of 3D titanium alloy-based open porous structures is developed, which applies a combination of chemical etching (CHE) and electrochemical polishing (ECP) using HF-based solutions.Abstract:
Additive manufacturing techniques can be used to produce micro-porous structures with global morphological properties that are highly controlled through robust computer design. Despite these advantages, most of these techniques still hold several functional constraints, resulting from present technical device limits and consequently the inability to control surface morphology at a microscale level. In this study, a novel protocol for surface modification of 3D titanium alloy-based open porous structures is developed, which applies a combination of chemical etching (CHE) and electrochemical polishing (ECP) using HF-based solutions. This protocol achieves significant and controllable roughness reduction of additive manufactured 3D Ti6Al4V open porous structures. Chemical etching mainly removes the attached powder grains, while ECP further decreases the roughness. In this way the heterogeneity of the strut surface roughness throughout the full 3D structure is effectively removed.read more
Citations
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Journal ArticleDOI
Surface texture metrology for metal additive manufacturing: a review
TL;DR: A comprehensive analysis of surface texture metrology for metal additive manufacturing has been performed in this paper, where the results of this analysis are divided into sections that address specific areas of interest: industrial domain; additive manufacturing processes and materials; types of surface investigated; surface measurement technology and surface texture characterisation.
Journal ArticleDOI
Processing parameters in laser powder bed fusion metal additive manufacturing
TL;DR: In this article, the effects of major process parameters on build quality (porosity, residual stress, and composition changes) and materials properties (microstructure and microsegregation) are reviewed.
Journal ArticleDOI
High-strength porous biomaterials for bone replacement: A strategy to assess the interplay between cell morphology, mechanical properties, bone ingrowth and manufacturing constraints.
Sajad Arabnejad,R. Burnett Johnston,Jenny Ann Pura,Baljinder Singh,Michael Tanzer,Damiano Pasini +5 more
TL;DR: This research is the first to demonstrate the occurrence of bone ingrowth into high-strength porous biomaterials which have higher structural efficiency than current porous biommaterials in the market, and it is shown that they encourage bone ing growth in a canine model.
Journal ArticleDOI
Revisiting fundamental welding concepts to improve additive manufacturing: From theory to practice
TL;DR: In this article, a unified equation to compute the energy density is proposed to compare works performed with distinct equipment and experimental conditions, covering the major process parameters: power, travel speed, heat source dimension, hatch distance, deposited layer thickness and material grain size.
Journal ArticleDOI
Effects of build orientation and heat treatment on the microstructure and mechanical properties of selective laser melted Ti6Al4V lattice structures
Ruben Wauthle,Bey Vrancken,Britt Beynaerts,Karl Jorissen,Jan Schrooten,Jean-Pierre Kruth,Jan Van Humbeeck +6 more
TL;DR: In this paper, the effect of build orientation selection and heat treatment on the mechanical properties of lattice structures with different geometries and their influence on mechanical properties was investigated, showing a significant decrease in mechanical strength for samples that are built diagonally and a transformation of the microstructure after a HIP (hot isostatic pressing) treatment, resulting in a lower maximum strength, but higher ductility.
References
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Spectral Analysis for Physical Applications: Multitaper and Conventional Univariate Techniques
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