Page 347 - IJB-10-1

International

Journal of Bioprinting

RESEARCH ARTICLE
Corrosion behavior of selective laser melting-

manufactured bio-applicable 316L stainless steel
in ionized simulated body fluid

Radim Kocich *, Lenka Kunčická , Marek Benč ,Adam Weiser , and
1
3
1,2
2,3
Gergely Németh 4
1 VŠB-Technical University of Ostrava, Faculty of Materials Science and Technology, 17. Listopadu
15, 70833 Ostrava 8, Czech Republic
2 Brno University of Technology, Faculty of Mechanical Engineering, Technická 2896-2, 60200 Brno,
Czech Republic
3 Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, 61662 Brno, Czech
Republic
4 Nuclear Physics Institute, Czech Academy of Sciences, Husinec - R ˇ ež 130, 250 68 R ˇ ež, Czech
Republic
(This article belongs to the Special Issue: 3D Bioprinting for Materials and Application)

Abstract

Additive manufacturing (AM) is gaining increasing popularity in various fields,
including biomedical engineering. Although AM enables fabrication of tailored
components with complex geometries, the manufactured parts typically feature
several internal issues, such as unpredictable distribution of residual stress and
*Corresponding author: printing defects. However, these issues can be reduced or eliminated by post-
Radim Kocich
(radim.kocich@vsb.cz) processing via thermomechanical treatment. The study investigated the effects
of combinations of AM and post-processing by the intensive plastic deformation
Citation: Kocich R, Kunčická L,
Benč M, Weiser A, Németh G. method of rotary swaging (variable swaging ratios) on microstructures, residual

Corrosion behavior of selective laser stress, and corrosion behaviors of AISI 316L stainless steel workpieces; the corrosion
melting-manufactured bio-applicable tests were performed in an ionized simulated body fluid. The results showed that
316L stainless steel in ionized
simulated body fluid. Int J Bioprint. the gradual swaging process favorably refined the grains and homogenized the
2024;10(1):1416. grain size. The imposed swaging ratio also directly influenced the development
doi: 10.36922/ijb.1416 of substructure and dislocations density. A high density of dislocations positively
Received: July 30, 2023 affected the corrosion resistance, whereas annihilation of dislocations and
Accepted: September 7, 2023 formation of subgrains had a negative effect on the corrosion behavior. The first
Published Online: January 5, 2024 few swaging passes homogenized the distribution of residual stress within the
Copyright: © 2024 Author(s). workpiece and acted toward imparting a predominantly compressive stress state,
This is an Open Access article which also favorably influenced the corrosion behavior. Lastly, the presence of the
distributed under the terms of the
Creative Commons Attribution {111}||swaging direction texture fiber (of a high intensity) increased the resistance
License, permitting distribution, to pitting corrosion. Overall, the most favorable corrosion behavior was acquired for
and reproduction in any medium, the AM sample subjected to the swaging ratio of 0.8, exhibiting a strong fiber texture
provided the original work is
properly cited. and a high density of dislocations.
Publisher’s Note: AccScience
Publishing remains neutral with Keywords: Additive manufacturing; Rotary swaging; 316L stainless steel; Electro-
regard to jurisdictional claims in
published maps and institutional chemical corrosion; Microstructure; Residual stress
affiliations.

Volume 10 Issue 1 (2024) 339 https://doi.org/10.36922/ijb.1416