Microstructure and Mechanical Properties of AISI 304L Austenitic Stainless Steel Processed by Various Schedules of Rolling

Рааб, А. Г.; Рааб, Г. И.; Tokar, A. A.; Rybalchenko, O. V.; Belyakov, Andrey; Добаткин, С. В.; La, Pei Qing

doi:10.1088/1742-6596/1688/1/012007

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…These devices are usually fabricated from corrosion-resistant materials, such as stainless steel (316 L), cobalt-chromium (Co-Cr), titanium alloys, platinum-iridium (Pt-Ir) alloys, tantalum (Ta) or nitinol (Ni-Ti) and are permanently implanted (Raab et al , 2020; Fu et al , 2022; Antanasova et al , 2018; Perez et al , 2019; della Valle et al , 2021; Dahiya et al , 2022). Traditional stent manufacturing techniques include etching, micro-electro discharge machining, electroforming, die-casting and laser cutting, as shown in Figure 1 (Wang et al , 2021; McGee et al , 2022).…”

Section: Introductionmentioning

confidence: 99%

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

Baila,

Sanfilippo,

Savu

et al. 2024

RPJ

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Purpose The development of new advanced materials, such as photopolymerizable resins for use in stereolithography (SLA) and Ti6Al4V manufacture via selective laser melting (SLM) processes, have gained significant attention in recent years. Their accuracy, multi-material capability and application in novel fields, such as implantology, biomedical, aviation and energy industries, underscore the growing importance of these materials. The purpose of this study is oriented toward the application of new advanced materials in stent manufacturing realized by 3D printing technologies. Design/methodology/approach The methodology for designing personalized medical devices, implies computed tomography (CT) or magnetic resonance (MR) techniques. By realizing segmentation, reverse engineering and deriving a 3D model of a blood vessel, a subsequent stent design is achieved. The tessellation process and 3D printing methods can then be used to produce these parts. In this context, the SLA technology, in close correlation with the new types of developed resins, has brought significant evolution, as demonstrated through the analyses that are realized in the research presented in this study. This study undertakes a comprehensive approach, establishing experimentally the characteristics of two new types of photopolymerizable resins (both undoped and doped with micro-ceramic powders), remarking their great accuracy for 3D modeling in die-casting techniques, especially in the production process of customized stents. Findings A series of analyses were conducted, including scanning electron microscopy, energy-dispersive X-ray spectroscopy, mapping and roughness tests. Additionally, the structural integrity and molecular bonding of these resins were assessed by Fourier-transform infrared spectroscopy–attenuated total reflectance analysis. The research also explored the possibilities of using metallic alloys for producing the stents, comparing the direct manufacturing methods of stents’ struts by SLM technology using Ti6Al4V with stent models made from photopolymerizable resins using SLA. Furthermore, computer-aided engineering (CAE) simulations for two different stent struts were carried out, providing insights into the potential of using these materials and methods for realizing the production of stents. Originality/value This study covers advancements in materials and additive manufacturing methods but also approaches the use of CAE analysis, introducing in this way novel elements to the domain of customized stent manufacturing. The emerging applications of these resins, along with metallic alloys and 3D printing technologies, have brought significant contributions to the biomedical domain, as emphasized in this study. This study concludes by highlighting the current challenges and future research directions in the use of photopolymerizable resins and biocompatible metallic alloys, while also emphasizing the integration of artificial intelligence in the design process of customized stents by taking into consideration the 3D printing technologies that are used for producing these stents.

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Section: Introductionmentioning

confidence: 99%

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

Baila,

Sanfilippo,

Savu

et al. 2024

RPJ

View full text Add to dashboard Cite

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Mechanical and Wetting Properties of Ta2O5 and ZnO Coatings on Alloy Substrate of Cardiovascular Stents Manufactured by Casting and DMLS

et al. 2022

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In the last years, additive manufacturing technologies have been developed, especially direct metal laser sintering, and used in the dental and medical implant domains. Cardiovascular stents have evolved from bioinert, bare metal cages to biomimetic devices that promote tissue regeneration or healing. In this paper, comparisons concerning mechanical properties between Co–Cr alloy and cast 304L stainless steel were realized using FEM analysis, necessary for manufacturing cardiovascular stents by DMLS technology using Co–Cr alloy. The purpose of this paper consists of the evaluation of the contact angle at the interface of the Co–Cr alloy manufactured by DMLS, respectively, cast stainless steel 304L, and thin film deposition realized by the e-gun method (Ta2O5 and ZnO). Scanning electronic microscopy SEM and EDX techniques were employed for morphological investigation of the sintered samples manufactured by the DMLS process. They were also used for semi-quantitative and qualitative chemical and metallographic analyses. The e-gun coating was used to obtain thin films with the nanometer order of Ta2O5 and ZnO with a protective role to improve the corrosion resistance, roughness, and antiseptic role.

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Microstructure and Mechanical Properties of AISI 304L Austenitic Stainless Steel Processed by Various Schedules of Rolling

Cited by 2 publications

References 7 publications

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

3D printing of personalised stents using new advanced photopolymerizable resins and Ti-6Al-4V alloy

Mechanical and Wetting Properties of Ta2O5 and ZnO Coatings on Alloy Substrate of Cardiovascular Stents Manufactured by Casting and DMLS

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