Publication detail

Fatigue performance of hierarchically porous titanium scaffolds produced by additive manufacturing and its possible improvement by gas nitriding

SLÁMEČKA, K. KASHIMBETOVA, A. TKACHENKO, S. GEJDOŠ, P. POKLUDA, J. MONTUFAR JIMENEZ, E. ČELKO, L.

Original Title

Fatigue performance of hierarchically porous titanium scaffolds produced by additive manufacturing and its possible improvement by gas nitriding

Type

conference paper

Language

English

Original Abstract

This contribution focuses on the nitriding of hierarchically porous titanium scaffolds to enhance their fatigue behaviour. Firstly, recent experimental findings that demonstrate the benefits of intra-filament porosity in improving fatigue resistance are discussed, providing details on crack growth shielding micromechanisms. Subsequently, the study explores the application of titanium scaffolds nitriding as a promising technique to prolong fatigue crack initiation. The scaffolds, prepared using the direct ink writing method with intra-filament porosity of similar to 6% and inter-filament porosity of similar to 68%, underwent gas nitriding at 1100 degrees C for 2 h. This process resulted in the formation of a consistent 42 mu m thick nitriding case across the entire structure. Preliminary experiments showed a minimal decrease in fatigue strength within the low cycle fatigue region, attributed to the fracturing of a thick brittle compound zone under high applied loading. These results suggest that nitriding has the potential to improve fatigue performance after process optimization.

Keywords

Fatigue crack propagation; Low-cycle fatigue; Nitriding; Optimization; Porosity; Scaffolds; Titanium

Authors

SLÁMEČKA, K.; KASHIMBETOVA, A.; TKACHENKO, S.; GEJDOŠ, P.; POKLUDA, J.; MONTUFAR JIMENEZ, E.; ČELKO, L.

Released

21. 6. 2023

Publisher

IOP PUBLISHING LTD

Location

BRISTOL

ISBN

1742-6588

Periodical

Journal of Physics: Conference Series

Year of study

2692

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages count

7

URL

https://iopscience.iop.org/article/10.1088/1742-6596/2692/1/012044

BibTex

@inproceedings{BUT188688,
  author="Karel {Slámečka} and Adelia {Kashimbetova} and Serhii {Tkachenko} and Pavel {Gejdoš} and Jaroslav {Pokluda} and Edgar Benjamin {Montufar Jimenez} and Ladislav {Čelko}",
  title="Fatigue performance of hierarchically porous titanium scaffolds produced by additive manufacturing and its possible improvement by gas nitriding",
  booktitle="Journal of Physics: Conference Series",
  year="2023",
  journal="Journal of Physics: Conference Series",
  volume="2692",
  number="1",
  pages="7",
  publisher="IOP PUBLISHING LTD",
  address="BRISTOL",
  doi="10.1088/1742-6596/2692/1/012044",
  issn="1742-6588",
  url="https://iopscience.iop.org/article/10.1088/1742-6596/2692/1/012044"
}