Magnetic properties evaluation of 316L stainless steel produced by additive manufacturing for biomedical use
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2023
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LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th
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Introduction and objective: The modern additive manufacturing (AM) techniques represent the current
state of the art of industry 4.0. Advanced selective laser melting techniques allow the production of parts
with the most varied sizes, shapes and complex geometries, which would be difficult to obtain previously
with casting, joining, machining, among others. In addition to saving material, they are automated, do not
generate wear to the tooling and little waste. The durability of surgical instruments, implants, and prostheses
with this type of manufacturing can be considered greater than that using conventional methods with cutting
tools [1]. Austenitic stainless steels have been widely used for the manufacture of implants due to their good
mechanical and electrochemical properties and their relative low cost. The present work evaluated the
variation of some laser beam conditions, regarding the magnetic susceptibility in AISI 316L stainless steel
samples produced by additive manufacturing (AM).
Methodology: The magnetic susceptibility of AISI 316L stainless steel was measured on samples produced
by selective laser melting (SLM), in the dimensions: (12 x 35 x 3) [mm], layer thickness: 30 [μm], power: 53,
73, 93, 132 [W] and scanning speed: 800, 900, 1000, 1100 [mm/s]; seeking to meet requirements of:
adequate surface finish, i.e. low roughness, high density (with low porosity index), according to the standard
for metallic materials obtained by additive manufacturing (ASTM F3122-14).
Results and discussion: This occur because there is a microstructural transformation of the austenitic steel
surface from the temperature increase generated by the laser beam energy. As the austenitic phase is
paramagnetic, but the altered phase is ferromagnetic, a magnetic method was used to identify this
transformation. The amount of altered material is tiny, and so the magnetic method must be extremely
sensitive. To this end, a device like a susceptibility balance was set up. The use of an analytical balance
allowed the measurement of this transformation with acceptable uncertainties.
Conclusions: The powder metallurgy production process using selective laser melting induced the formation
of magnetic phases on the surfaces of the evaluated samples, resulting in small but significant changes in the
magnetic susceptibility values.
Como referenciar
PIERETTI, EURICO F.; BONANI, EDUARDO G.; NEVES, MAURICIO D.M.; ANTUNES, RENATO A.; MARTIN, RAMON V. Magnetic properties evaluation of 316L stainless steel produced by additive manufacturing for biomedical use. In: LATIN-AMERICAN CONGRESS OF ARTIFICIAL ORGANS AND BIOMATERIALS, 12th, December 12-15, 2023, Mar del Plata, Argentina. Abstract... p. 81-81. Disponível em: https://repositorio.ipen.br/handle/123456789/47948. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.