Liquid Nitriding of Stainless Steel 316L to improve fatigue properties for Orthopedic Screws

Authors

  • Marwan Arbilei Arbilei University of Technology, Department of Biomedical Engineering
  • Jamal Mohammed Hamed Biomedical Eng. Dep., University of Technolog, Baghdad, IRAQ

DOI:

https://doi.org/10.29194/NJES.21040508

Keywords:

Liquid Nitriding, SS316L, Fatigue, Brinell Hardness

Abstract

 Liquid nitrate is an important method used to improve mechanical properties. One of these properties is resistance to fatigue. The aim of this study was to improve the fatigue resistance of the stainless steel 316L. The rotational bending method was used with constant and variable stresses at different times of (1, 3, 5) hours and at (530, 630) C0. These tests were performed before and after nitration.

The results showed that the depth of the nitride layer was (0.21, 0.33, 0.45) mm, increasing with time nitriding when the temperature was 530 C0. While the depth of this layer at a temperature of 630 C0 (0.26, 0.39,0.5) mm with increasing time. As a result of these processes, a layer of solid chromium nitrides and other phases of iron nitride were formed on the outer surface. These layers helped to inhibit the growth of the cracks and their progress in addition to the generation of pressure stresses on the surface leading to obstructing the progress of the cracks.

This study showed that the fatigue resistance was directly proportional to the increase in nitrate time due to the increased depth of the hardened layer, but this resistance decreased when the temperature was 630 C0 due to the formation of brittle phase with low resistance.

Downloads

Download data is not yet available.

Downloads

Published

21-12-2018

How to Cite

Arbilei, M. A., & Hamed, J. M. (2018). Liquid Nitriding of Stainless Steel 316L to improve fatigue properties for Orthopedic Screws. Al-Nahrain Journal for Engineering Sciences, 21(4), 508–515. https://doi.org/10.29194/NJES.21040508

Issue

Vol. 21 No. 4 (2018): Al-Nahrain Journal for Engineering Sciences

Section

Articles

License

Author(s) Rights

  1. Each author retains the right to use the work for non-commercial purposes as well as for further research and spoken presentations.
  2. Each author retains the right to use the illustrations and research data in his/her future work.
  3. Only one offprint is provided free for each author. The authors can order offprints at the proof stage at certain rates depending on the number of additional copies required and the year of publication.

 

Publisher Rights

The publisher of the journal has full rights for publication of the submitted manuscripts, electronic and facsimile formats and for electronic capture, reproduction and licensing in all formats now and in perpetuity in the original and all derivative works.