Improving the fatigue performance of porous metallic biomaterials produced by Selective Laser Melting

Hooreweder, Brecht Van; Apers, Yanni; Lietaert, Karel; Kruth, Jean‐Pierre

doi:10.1016/j.actbio.2016.10.005

Cited by 256 publications

(127 citation statements)

References 31 publications

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“…The most crucial irradiation parameter was found to be the laser power, which directly impacts the porosity and dimensions of the lattice structure. [303] On a side note, the chemical etching was found to improve the fatigue behavior on [302] Regarding the fatigue behavior of additively manufactured Ti6Al4V lattice structures, the best fatigue properties were reported for a post-treatment consisting of HIP and chemical etching.…”

Section: Am In the Medical Sectormentioning

confidence: 99%

“…[302] Regarding the fatigue behavior of additively manufactured Ti6Al4V lattice structures, the best fatigue properties were reported for a post-treatment consisting of HIP and chemical etching. [303] On a side note, the chemical etching was found to improve the fatigue behavior on Ti6Al4V scaffolds, however, on CoCr scaffolds the etching does not alter the fatigue properties, but still successfully removes adhering particles. [304] Lately, the focus shifted from the predominantly investigated Ti6Al4V alloy toward alternative titanium based alloys, such as TiTa or TiTaZr, which have an advantage regarding their Young's modulus, which is much lower and thus, reduces stressshielding effects.…”

Section: Am In the Medical Sectormentioning

confidence: 99%

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A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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Additive manufacturing has multiple advantages over conventional fabrication techniques, such as the geometrical freedom and, to a great extent, the omission of tooling equipment. Hence, futuristic designs and non-standard topology-optimized structures can be fabricated without causing noteworthy extra cost, since the geometrical complexity is, exaggeratedly spoken, for free. The manufacturing time and the amount of required raw material are the key criteria, which determine the expenses. What at first glance appears as an engineer's dream, introduces its complexity in the description of the material's characteristics and their volatility to the manufacturing conditions. Within this study, the main properties (i.e., surface hardness, tensile, and compression strength, as well as fracture toughness) and their anisotropic and inhomogeneous nature are addressed. Detailed overviews of the progress to date for aluminum, iron, titanium, cobalt, and nickel based raw materials are provided. Furthermore, an overview about the state-of-the-art in the medical sector is included, comprising the areas of utilization and several trail studies.

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Section: Am In the Medical Sectormentioning

confidence: 99%

Section: Am In the Medical Sectormentioning

confidence: 99%

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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“…Thus, large surface area of 3D printed porous scaffolds, was responsible for a significant impact on mechanical properties induced by surface modification. Irrespective of the above, an improvement in fatigue strength was noticed on chemically etching with same etchant compared to the as-fabricated samples of Ti-6Al-4V alloy, but not in the case of CoCrMo alloy [83,84]. The differences were attributed to low notch (surface roughness and micro-pitting after etching) sensitivity of CoCrMo alloy with more ductility than Ti-6Al-4V alloy.…”

Section: Role Of Post-fabrication Surface Modificationmentioning

confidence: 79%

“…Several post-fabrication treatments such as stress relieving, surface heat treatment, and hot isostatic pressing (HIP) have been explored for porous scaffolds [83,84]. The process of annealing or aging implemented after fabrication led to a different microstructure, where the mechanical properties are sensitive to the microstructure [85].…”

Section: Role Of Post-fabrication Heat Treatmentmentioning

confidence: 99%

Advancements in three-dimensional titanium alloy mesh scaffolds fabricated by electron beam melting for biomedical devices: mechanical and biological aspects

Nune

Misra

2017

Sci. China Mater.

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We elucidate here the process-structure-property relationships in three-dimensional (3D) implantable titanium alloy biomaterials processed by electron beam melting (EBM) that is based on the principle of additive manufacturing. The conventional methods for processing of biomedical devices including freeze casting and sintering are limited because of the difficulties in adaptation at the host site and difference in the micro/macrostructure, mechanical, and physical properties with the host tissue. In this regard, EBM has a unique advantage of processing patient-specific complex designs, which can be either obtained from the computed tomography (CT) scan of the defect site or through a computeraided design (CAD) program. This review introduces and summarizes the evolution and underlying reasons that have motivated 3D printing of scaffolds for tissue regeneration. The overview comprises of two parts for obtaining ultimate functionalities. The first part focuses on obtaining the ultimate functionalities in terms of mechanical properties of 3D titanium alloy scaffolds fabricated by EBM with different characteristics based on design, unit cell, processing parameters, scan speed, porosity, and heat treatment. The second part focuses on the advancement of enhancing biological responses of these 3D scaffolds and the influence of surface modification on cell-material interactions. The overview concludes with a discussion on the clinical trials of these 3D porous scaffolds illustrating their potential in meeting the current needs of the biomedical industry.

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“…Van Hooreweder et al [132] compared the effects of stress relieving, hot isostatic pressing and chemical etching on the fatigue properties of Ti6Al4V lattice structures. The results showed chemical etching as significantly superior, due to the removal of attached powder yielding smoother surfaces.…”

Section: Post-processingmentioning

confidence: 99%

Review of defects in lattice structures manufactured by powder bed fusion

Echeta

Feng

Dutton

et al. 2019

Int J Adv Manuf Technol

158

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Additively manufactured lattice structures are popular due to their desirable properties, such as high specific stiffness and high surface area, and are being explored for several applications including aerospace components, heat exchangers and biomedical implants. The complexity of lattices challenges the fabrication limits of additive manufacturing processes and thus, lattices are particularly prone to manufacturing defects. This paper presents a review of defects in lattice structures produced by powder bed fusion processes. The review focuses on the effects of lattice design on dimensional inaccuracies, surface texture and porosity. The design constraints on lattice structures are also reviewed, as these can help to discourage defect formation. Appropriate process parameters, post-processing techniques and measurement methods are also discussed. The information presented in this paper contributes towards a deeper understanding of defects in lattice structures, aiming to improve the quality and performance of future designs.

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Improving the fatigue performance of porous metallic biomaterials produced by Selective Laser Melting

Cited by 256 publications

References 31 publications

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

Advancements in three-dimensional titanium alloy mesh scaffolds fabricated by electron beam melting for biomedical devices: mechanical and biological aspects

Review of defects in lattice structures manufactured by powder bed fusion

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