Highly porous, low elastic modulus 316L stainless steel scaffold prepared by selective laser melting

Čapek, Jaroslav; Machová, Markéta; Fousová, Michaela; Kubásek, Jiří; Vojtěch, Dalibor; Fojt, Jaroslav; Jablonská, Eva; Lipov, Jan; Ruml, Tomáš

doi:10.1016/j.msec.2016.07.027

Cited by 162 publications

(70 citation statements)

References 40 publications

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“…Combined with CAD and CT technology, it can produce bone scaffolds with precise and controllable internal structure, as well as customized shape [39]. Previously, researchers had successfully employed AM techniques to fabricate porous metal scaffolds, such as Ti based scaffolds [40] and 316 L steel scaffolds [41], for bone implant application. Nevertheless, both Ti and 316 L have no degradability, thus need a second surgery to remove.…”

Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Selective laser melted Fe-Mn bone scaffold: microstructure, corrosion behavior and cell response

Shuai

Yang

et al. 2020

Mater. Res. Express

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Iron metal possesses good biocompatibility and excellent mechanical strength, though it degrades too slowly. In this work, selective laser melting (SLM) was applied to fabricate iron-manganese (Fe-Mn) biodegradable scaffold. Results shown Fe-Mn scaffold exhibited a uniform pore structure with a porosity of 66.72±2.3%, which highly matched with as-designed model. Phase analysis revealed Fe-Mn scaffold mainly contained α-Fe, martensitic and austenitic phases. Due to the potential difference among these different phases, galvanic corrosion occurred in Fe matrix. In addition, a small amount of Mn distributed at grain boundaries also contributed to the formation of galvanic corrosion. Thus, the corrosion rate increased from 0.09±0.02 mm/year to 0.23±0.05 mm/year. The scaffold exhibited suitable mechanical properties with a yield strength of 137±8.4 MPa, an ultimate strength of 221.7±10.9 MPa. Moreover, cell assays demonstrated its good cytocompatibility. Taking these positive results into consideration, SLM processed Fe-Mn scaffold was a promising material for bone repair application.

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Section: Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Selective laser melted Fe-Mn bone scaffold: microstructure, corrosion behavior and cell response

Shuai

Yang

et al. 2020

Mater. Res. Express

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“…Jandin et al successfully prepared porous stainless steel materials using SLM for the first time [50]. Then,Čapek et al found that porous stainless steel using SLM has superior composite performance compared to solid stainless steel specimens obtained by casting and hot forging [51]. Furthermore, Wehmoller et al successfully prepared a series of 316L SS implants using SLM technology [52].…”

Section: Biocompatible Metallic Materialsmentioning

confidence: 99%

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Bai

Cheng

Chen

et al. 2019

Metals

121

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Metals have been used for orthopedic implants for a long time due to their excellent mechanical properties. With the rapid development of additive manufacturing (AM) technology, studying customized implants with complex microstructures for patients has become a trend of various bone defect repair. A superior customized implant should have good biocompatibility and mechanical properties matching the defect bone. To meet the performance requirements of implants, this paper introduces the biomedical metallic materials currently applied to orthopedic implants from the design to manufacture, elaborates the structure design and surface modification of the orthopedic implant. By selecting the appropriate implant material and processing method, optimizing the implant structure and modifying the surface can ensure the performance requirements of the implant. Finally, this paper discusses the future development trend of the orthopedic implant.

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“…These advantages known to be relevant to high-cost alloys (superalloys or titanium alloys) and aerospace applications, are also significant for austenitic stainless steels. 316L, for example, has been satisfactorily processed into components, and their mechanical performances have allowed them to be put into service [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Austenitic Stainless Steel Powders with Increased Nitrogen Content for Laser Additive Manufacturing

Cui

Uhlenwinkel

Schulz

et al. 2019

Metals

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Nitrogen is used as an alloying element, substituting the expensive and allergenic element nickel, in austenitic stainless steels to improve their mechanical properties and corrosion resistance. The development of austenitic stainless steel powders with increased nitrogen content for laser additive manufacturing has recently received great interest. To increase nitrogen content in the austenitic steel powders (for example AISI 316L), two measures are taken in this study: (1) melting the steel under a nitrogen atmosphere, and (2) adding manganese to increase the solubility of nitrogen in the steel. The steel melt is then atomized by means of gas atomization (with either nitrogen or argon). The resulting powders are examined and characterized with regard to nitrogen content, particle size distribution, particle shape, microstructure, and flowability. It shows that about 0.2-0.3 mass % nitrogen can be added to the austenitic stainless steel 316L by adding manganese and melting the steel under nitrogen atmosphere. The particles are spherical in shape and very few satellite particles are observed. The steel powders show good flowability and packing density, therefore they can be successfully processed by means of laser powder bed fusion (L-PBF).

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Highly porous, low elastic modulus 316L stainless steel scaffold prepared by selective laser melting

Cited by 162 publications

References 40 publications

Selective laser melted Fe-Mn bone scaffold: microstructure, corrosion behavior and cell response

Selective laser melted Fe-Mn bone scaffold: microstructure, corrosion behavior and cell response

Additive Manufacturing of Customized Metallic Orthopedic Implants: Materials, Structures, and Surface Modifications

Austenitic Stainless Steel Powders with Increased Nitrogen Content for Laser Additive Manufacturing

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