Engineering the elastic modulus of NiTi cellular structures fabricated by selective laser melting

Bartolomeu, F.; Costa, M.M.; Alves, Nuno; Miranda, G.; Silva, Filipe

doi:10.1016/j.jmbbm.2020.103891

Cited by 31 publications

(15 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The elastic modulus of the G-structure unit with different porosities was calculated by the finite element simulation software, and the results are shown in Table 3 . It can be found that the elastic modulus of the G-structure unit gradually decreases with the increase in porosity, which is consistent with the results obtained by Bartolomeu et al (2020) . The porous scaffolds with different pore size distribution strategies have different porosities.…”

Section: Resultssupporting

confidence: 91%

Pore Strategy Design of a Novel NiTi-Nb Biomedical Porous Scaffold Based on a Triply Periodic Minimal Surface

Liu

Wang

et al. 2022

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

The pore strategy is one of the important factors affecting the biomedical porous scaffold at the same porosity. In this work, porous scaffolds were designed based on the triply periodic minimal surface (TPMS) structure under the same porosity and different pore strategies (pore size and size continuous gradient distribution) and were successfully prepared using a novel Ni46.5Ti44.5Nb9 alloy and selective laser melting (SLM) technology. After that, the effects of the pore strategies on the microstructure, mechanical properties, and permeability of porous scaffolds were systematically investigated. The results showed that the Ni46.5Ti44.5Nb9 scaffolds have a low elastic modulus (0.80–1.05 GPa) and a high ductility (15.3–19.1%) compared with previous works. The pore size has little effect on their mechanical properties, but increasing the pore size significantly improves the permeability due to the decrease in specific surfaces. The continuous gradient distribution of the pore size changes the material distribution of the scaffold, and the smaller porosity structure has a better load-bearing capacity and contributes primarily to the high compression strength. The local high porosity structure bears more fluid flow, which can improve the permeability of the overall scaffold. This work can provide theoretical guidance for the design of porous scaffolds.

show abstract

Section: Resultssupporting

confidence: 91%

Pore Strategy Design of a Novel NiTi-Nb Biomedical Porous Scaffold Based on a Triply Periodic Minimal Surface

Liu

Wang

et al. 2022

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…The observed differences (open-cell and wall dimensions, porosity and mechanical results) between the CAD designs and the SLM produced structures are relevant and can be used as design standards capable to integrate and anticipate Selective Laser Melting inherent deviations when fabricating Ti6Al4V cellular structures (Bartolomeu et al, 2020b(Bartolomeu et al, , 2020c. By considering this, Ti6Al4V cellular structures that display de intended dimensions, porosity and elastic modulus can be obtained by SLM.…”

Section: Mechanical Characterizationmentioning

confidence: 95%

Selective Laser Melting of Ti6Al4V sub-millimetric cellular structures: Prediction of dimensional deviations and mechanical performance

Bartolomeu

Costa

Alves

et al. 2021

Journal of the Mechanical Behavior of Biomedical Materials

Self Cite

View full text Add to dashboard Cite

“…Today typical applications in the health care sector are those of stents for bypass heart surgery and dental braces for teeth alignments. Several attempts to SLM this alloy have been pursued in recent years, with positive outcomes signaling the way to three-dimensional printing medical scaffolds, cellular structures and implants (Bartolomeu et al, 2020;Habijan et al, 2013;Saedi et al, 2016;Shayesteh Moghaddam et al, 2019;Shishkovsky et al, 2012;Speirs et al, 2017;Yu et al, 2021).…”

Section: Nickel-based Alloysmentioning

confidence: 99%

Selective laser melting: lessons from medical devices industry and other applications

Fé-Perdomo

Ramos‐Grez

Beruvides³

et al. 2021

RPJ

View full text Add to dashboard Cite

Purpose The purpose of this paper is to outline some key aspects such as material systems used, phenomenological and statistical process modeling, techniques applied to monitor the process and optimization approaches reported. All these need to be taken into account for the ongoing development of the SLM technique, particularly in health care applications. The outcomes from this review allow not only to summarize the main features of the process but also to collect a considerable amount of investigation effort so far achieved by the researcher community. Design/methodology/approach This paper reviews four significant areas of the selective laser melting (SLM) process of metallic systems within the scope of medical devices as follows: established and novel materials used, process modeling, process tracking and quality evaluation, and finally, the attempts for optimizing some process features such as surface roughness, porosity and mechanical properties. All the consulted literature has been highly detailed and discussed to understand the current and existing research gaps. Findings With this review, there is a prevailing need for further investigation on copper alloys, particularly when conformal cooling, antibacterial and antiviral properties are sought after. Moreover, artificial intelligence techniques for modeling and optimizing the SLM process parameters are still at a poor application level in this field. Furthermore, plenty of research work needs to be done to improve the existent online monitoring techniques. Research limitations/implications This review is limited only to the materials, models, monitoring methods, and optimization approaches reported on the SLM process for metallic systems, particularly those found in the health care arena. Practical implications SLM is a widely used metal additive manufacturing process due to the possibility of elaborating complex and customized tridimensional parts or components. It is corroborated that SLM produces minimal amounts of waste and enables optimal designs that allow considerable environmental advantages and promotes sustainability. Social implications The key perspectives about the applications of novel materials in the field of medicine are proposed. Originality/value The investigations about SLM contain an increasing amount of knowledge, motivated by the growing interest of the scientific community in this relatively young manufacturing process. This study can be seen as a compilation of relevant researches and findings in the field of the metal printing process.

show abstract

Engineering the elastic modulus of NiTi cellular structures fabricated by selective laser melting

Cited by 31 publications

References 49 publications

Pore Strategy Design of a Novel NiTi-Nb Biomedical Porous Scaffold Based on a Triply Periodic Minimal Surface

Pore Strategy Design of a Novel NiTi-Nb Biomedical Porous Scaffold Based on a Triply Periodic Minimal Surface

Selective Laser Melting of Ti6Al4V sub-millimetric cellular structures: Prediction of dimensional deviations and mechanical performance

Selective laser melting: lessons from medical devices industry and other applications

Contact Info

Product

Resources

About