| Issue |
MATEC Web Conf.
Volume 388, 2023
2023 RAPDASA-RobMech-PRASA-AMI Conference Advanced Manufacturing Beyond Borders - The 24th Annual International RAPDASA Conference joined by RobMech, PRASA and AMI, hosted by CSIR and CUT
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|---|---|---|
| Article Number | 10006 | |
| Number of page(s) | 15 | |
| Section | AM Post Processing & Qualification | |
| DOI | https://doi.org/10.1051/matecconf/202338810006 | |
| Published online | 15 December 2023 | |
Laser shock peening of laser powder bed fusion produced Ti6Al4V for potential improvements to implant performance
1 School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, 2000 Johannesburg, South Africa
2 DSI-NRF Centre of Excellence in Strong Materials, hosted by the University of the Witwatersrand
3 Council for Scientific and Industrial Research (CSIR), National Laser Centre, 0081 Pretoria, South Africa
4 Mechanical Engineering, Nelson Mandela University, 6019 Gqeberha, South Africa
* Corresponding author: triststrydom@gmail.com
Titanium alloy based implants are becoming more common with medical advancements and longer global life expectancy. With its geometrical design freedom, low material wastage, and mass customisation, additive manufacturing has found growing use in biomedical applications. In this study, laser shock peening without coating (LSPwC) was investigated as a means to enhance the surface and mechanical properties of selective laser melted Ti6Al4V implants. The application of LSPwC was found to induce a favourable surface oxide layer, increase the measured surface roughness and hardness, and reverse the tensile residual stresses imparting deep, high-magnitude compressive residual stresses. The combination of oxide layer, increased roughness, and induced compressive stress will potentially improve implant osseointegration and increase fatigue life.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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