Microstructure and mechanical behavior of porous Ti–6Al–4V parts obtained by selective laser melting

Sallica-Leva, Edwin; Jardini, André Luiz; Fogagnolo, João Batista

doi:10.1016/j.jmbbm.2013.05.011

Cited by 300 publications

(183 citation statements)

References 34 publications

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“…8(a) are broad owing to the high crystal distortion of α' phase, while the diffraction peaks after the heat treatment in Fig. 8(b) become much narrower and sharper, indicating the presence of α phase, which is an equilibrium phase and has a lower crystal distortion compared to the α' phase (Sallica- Leva et al, 2013). Additionally, the peak intensities in the as-built condition are significantly lower than those of the heat-treated sample, indicating finer microstructure in this case.…”

Section: Figure 4 Sem Images Of Strut Surface Of the Ti-6al-4v Tmps Cmentioning

confidence: 99%

“…These bonded partilces can be deleterious to the mechanical properties, especially fatigue strength (Hrabe et al, 2011). Moreover, they are partially bonded to the strut surfaces, and may, therefore, be released to the biological systems, resulting in inflammation (Sallica-Leva et al, 2013).…”

Section: Measurements and Characterisationsmentioning

confidence: 99%

“…Selective laser melting (SLM), also termed as direct metal laser sintering (DMLS), and electron beam melting (EBM) are the powder bed fusion (PBF) processes of additive manufacturing (AM) technologies, and capable of fabricating near-fully dense metal components with complex freeform geometries directly from computer-aided design (CAD) models (Koike et al, 2011), therefore showing great potential to fabricate metallic cellular lattice structures beyond the current limitations of the conventional manufacturing techniques. Recently, many attempts have been made to fabricate porous titanium scaffolds or orthopaedic implants with precisely controlled internal structures and complex external shapes through SLM or EBM (Mullen et al, 2009;Bertol et al, 2010;Gorny et al, 2011;Murr et al, 2010;Heinl et al, 2008;Parthasarathy et al, 2010;Sallica-Leva et al, 2013). For example, Mullen et al (2009) built cellular titanium structures based on an octahedral unit cell through SLM for orthopaedic applications, and the produced structures possessed the porosity of 10-95% and compressive strength of 0.5-350MPa comparable to the typical naturally occurring range of natural bones.…”

Section: Introductionmentioning

confidence: 99%

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Ti–6Al–4V triply periodic minimal surface structures for bone implants fabricated via selective laser melting

Yan

Hao

Hussein

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

557

236

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Young, Ti-6Al-4V triply periodic minimal surface structures for bone implants fabricated via selective laser melting, Journal of the Mechanical Behavior of Biomedical Materials, http://dx.doi.org/10.1016/j.jmbbm. 2015.06.024 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. C for 4 h, the α' martensite was converted to a mixture of α and β, in which the α phase being the dominant fraction is present as fine laths with the width of 500-800 nm and separated by a small amount of narrow, interphase regions of dark β phase. Also, the microhardness is decreased to 3.71±0.35 GPa due to the coarsening of the microstructure. The 80-95% porosity TPMS lattices exhibit a comparable porosity with trabecular bone, and the modulus is in the range of 0.12-1.25 GPa and thus can be adjusted to the modulus of trabecular bone. At the same range of porosity of 5-10%, the moduli of cortical bone and of the Ti-6Al-4V TPMS lattices are in a similar range. Therefore, the modulus and porosity of Ti-6Al-4V TPMS lattices can be tailored to the levels of human bones and thus reduce or avoid "stress shielding"and increase longevity of implants. Due to the biomorphic designs, and high interconnected porosity and stiffness comparable to human bones, SLM-made Ti-6Al-4V TPMS lattices can be a promising material for load bearing bone implants.

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Section: Figure 4 Sem Images Of Strut Surface Of the Ti-6al-4v Tmps Cmentioning

confidence: 99%

Section: Measurements and Characterisationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ti–6Al–4V triply periodic minimal surface structures for bone implants fabricated via selective laser melting

Yan

Hao

Hussein

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

557

236

View full text Add to dashboard Cite

show abstract

“…The dimensional and mechanical properties of lattice structures can be improved by choosing the optimum process parameters [48]. For SLM, the most significant process parameters are laser power, scan speed, hatch spacing, and layer thickness.…”

Section: Manufacturingmentioning

confidence: 99%

“…The energy input can be calculated from the laser power, scan speed, and the laser spot diameter. Moreover, the higher the energy input, the more susceptible the strut is to have internal porosity [48]. Ahmadi et al [49] studied the effect of laser power and exposure time on the mechanical properties of lattice structures.…”

Section: Manufacturingmentioning

confidence: 99%

Lattice Structures and Functionally Graded Materials Applications in Additive Manufacturing of Orthopedic Implants: A Review

Mahmoud

Elbestawi

2017

JMMP

201

117

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A major advantage of additive manufacturing (AM) technologies is the ability to print customized products, which makes these technologies well suited for the orthopedic implants industry. Another advantage is the design freedom provided by AM technologies to enhance the performance of orthopedic implants. This paper presents a state-of-the-art overview of the use of AM technologies to produce orthopedic implants from lattice structures and functionally graded materials. It discusses how both techniques can improve the implants' performance significantly, from a mechanical and biological point of view. The characterization of lattice structures and the most recent finite element analysis models are explored. Additionally, recent case studies that use functionally graded materials in biomedical implants are surveyed. Finally, this paper reviews the challenges faced by these two applications and suggests future research directions required to improve their use in orthopedic implants.

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Effect of Diffusion Bonding Temperature on Compressive Property of Porous Titanium Alloys for Loading‐Bearing Biomedical Applications

Huang

et al. 2016

Proceedings of the 13th World Conference on Titanium

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Microstructure and mechanical behavior of porous Ti–6Al–4V parts obtained by selective laser melting

Cited by 300 publications

References 34 publications

Ti–6Al–4V triply periodic minimal surface structures for bone implants fabricated via selective laser melting

Ti–6Al–4V triply periodic minimal surface structures for bone implants fabricated via selective laser melting

Lattice Structures and Functionally Graded Materials Applications in Additive Manufacturing of Orthopedic Implants: A Review

Effect of Diffusion Bonding Temperature on Compressive Property of Porous Titanium Alloys for Loading‐Bearing Biomedical Applications

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