Compressive Behavior of Novel Additively Manufactured Ti-6Al-4V Lattice Structures: Experimental and Numerical Studies

Materials, Год журнала: 2024, Номер 17(15), С. 3691 - 3691

Опубликована: Июль 26, 2024

This paper presents novel configurations for additively manufactured lattice structures, including helical and elliptic designs, in addition to the pyramid base model. Functionally graded versions of structures are developed by considering desirable relative densities each layer. The were using Ti-6Al-4V powder a three-dimensional selective laser melting printer. averaged porosities 0.86, 0.91, 0.916, 0.93 0.74 pyramid, functionally elliptic, helical, respectively. mechanical behavior was characterized through compression tests universal testing machine computationally analyzed finite element code. results indicate that lattices have elastic moduli 0.76 0.67 GPa, while yield strengths 41.32 32.24 MPa, respectively, comparison cancellous bone. Moreover, show relatively lower 0.57, 0.65 0.41 GPa higher 54.1, 52.15 61.02 could be an indication they fit cortical bones. All samples low coupled with high strengths. reduce or eliminate stress shielding, making them suitable some load-bearing bio-inspired applications. A comparative study utilizing experimental numerical models conducted evaluate performance proposed designs.

Язык: Английский

---

THE POTENTIAL OF Ti-6Al-7Nb, AND DESIGN FOR MANUFACTURING CONSIDERATIONS IN MITIGATING FAILURE OF HIP IMPLANTS IN SERVICE.

Biomedical Engineering Advances, Год журнала: 2024, Номер 8, С. 100136 - 100136

Опубликована: Ноя. 1, 2024

Язык: Английский

---

Exploring the Frontiers of Metal Additive Manufacturing in Orthopaedic Implant Development

MethodsX, Год журнала: 2024, Номер 13, С. 103056 - 103056

Опубликована: Ноя. 15, 2024

Язык: Английский

---

Effect of Powder Recycling on the Surface and Selected Technological Properties of M300 Maraging Steel Produced via the SLM Method

Journal of Manufacturing and Materials Processing, Год журнала: 2024, Номер 8(6), С. 267 - 267

Опубликована: Ноя. 27, 2024

This study delves into selective laser melting (SLM). By using M300 steel in virgin and recycled powder form (after 20 cycles), with the aim of reducing cost printing for practical application maraging steel, a comprehensive comparison between two types was evaluated. The powder’s morphology analyzed scanning electron microscopy (SEM) backscattered electrons (BSE). particles were seen to have spherical shape, notable number satellites attached their surfaces. particle size distribution (PSD) examined ranged from 10 90 µm both powders. In addition, porosity exhibited an average value 0.07% 0.10% powder. microstructure examined. Additionally, surface wettability tested, it display wetting behavior powder, while blackened surfaces showed higher angle than untreated (hydrophobic). 2D roughness measurements that had no significant difference (Ra = 5.33 µm, Rz 24.17 µm) before blackening 5.48 24.07 after blackening. Corrosion tests proved did not affect corrosion properties material, caused partial samples, regardless used

Язык: Английский

---

Mechanical and Corrosion Behaviour in Simulated Body Fluid of As-Fabricated 3D Porous L-PBF 316L Stainless Steel Structures for Biomedical Implants

Journal of Functional Biomaterials, Год журнала: 2024, Номер 15(10), С. 313 - 313

Опубликована: Окт. 21, 2024

Laser powder bed fusion (L-PBF) is one of the most promising additive manufacturing technologies for creating customised 316L Stainless Steel (SS) implants with biomimetic characteristics, controlled porosity, and optimal structural functional properties. However, behaviour as-fabricated 3D SS structures without any surface finishing in environments that simulate body fluids remains largely unknown. To address this knowledge gap, present study investigates internal corrosion simulated fluid (SBF), mechanical properties manufactured by L-PBF rhombitruncated cuboctahedron (RTCO) unit cells two distinct relative densities (10 35%). The microstructural analysis confirmed RTCO structure has a pure austenitic phase roughness ~20 µm fine cellular morphology. micro-CT revealed presence keyholes lack pores both structures. Despite difference remain within range bone tissue line Gibson Ashby model. Additionally, demonstrated passive SBF solution. Thus, porous are biomaterials due to their suitable roughness, properties, resistance, facilitating growth.

Язык: Английский

---

Influence of toolpath strategies during laser polishing on additively manufactured biomaterials

Surface Engineering, Год журнала: 2024, Номер 40(9-10), С. 967 - 982

Опубликована: Сен. 1, 2024

Nowadays, Additive Manufacturing ( AM), i.e., the 3D Printing process, is one of advanced manufacturing processes for making a complex geometry with high accuracy. are widely used worldwide and fastest-growing industrial technology, as any structure minimal wastage materials can be fabricated. However, poor surface quality major limitation additive due to defects, including unmelted powder particles, balling, porosity, etc. Laser polishing utilizes remelting reflowing irregularities under influence high-power laser source efficiently improve additively manufactured parts. Herein, thin layer molten, because tension, molten material flows from peak into valley no loss surface. CNC-operated finishing method, hence an appropriate toolpath strategy required produce uniform on polished In present work, impact various strategies, raster, offset flat, contour parallel, Hilbert, Peano, spiral, over final analyzed during polishing. The maximum 92% reduction in average roughness observed fractal-based strategy, Peano improved hardness. Moreover, capable reducing all defects fabricated surface, scanning electron microscope. Furthermore, insignificant change composition after

Язык: Английский

---

A Static and High-Cycle Fatigue Characterization Framework of Metallic Lattice Structures Additive Manufactured Via Fused Deposition Modeling Based Method

Опубликована: Янв. 1, 2024

Язык: Английский

---