Influence of laser polishing and chemical etching on surface roughness, microstructure, and hardness of as-built Ti-5Al-5Mo-5V-3Cr alloy produced by laser powder bed fusion
Source abstract
Abstract
Ti-5Al-5Mo-5V-3Cr (Ti-5553) parts are used in aerospace applications due to their excellent mechanical and corrosion resistance properties. However, to use additively manufactured Ti-5553 components effectively, surface quality must be improved. This study demonstrates the effective use of laser polishing on laser powder bed fusion (LPBF)-manufactured Ti-5Al-5Mo-5V-3Cr (Ti-5553) parts, resulting in a significant reduction in surface roughness. Initial laser polishing reduced the surface roughness (Sa) from 17.4 to 4.9 μm, with subsequent chemical etching further lowering it to 4.1 μm. Across all tested conditions, Sa values remained within an acceptable range, from 4.9 to 9.7 μm. Microstructural analysis after laser polishing revealed characteristic wave patterns with some discontinuities, while chemical etching made the grain boundaries more visible. A slight reduction in hardness in the laser-polished samples suggests stress relief in the as-built samples, and transmission electron microscopy investigation confirmed that no phase transformation occurred at the polished surface. These findings underscore the effectiveness of laser polishing in enhancing the surface quality of LPBF-manufactured Ti-5553 parts for various applications.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Additive Manufacturing Materials and Processes · Titanium Alloys Microstructure and Properties · High Entropy Alloys Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Mechanical, Manufacturing and Biomedical Engineering, The University of Dublin, Trinity College 1 , Dublin 2,
Nammo Ireland 2 , Dublin 15,
Department of Mechanical Engineering, Gachon University 3 , 1342, Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120,
Funding
European Union's Horizon 2020
References (29)
Show source-provided references
1. Bone response to surface modified titanium implants: Studies on electropolished implants with different oxide thicknesses and morphology10.1016/0142-9612(94)90092-2 ↗
2. CO2 laser polishing of laser-powder bed fusion produced AlSi10Mg parts10.1016/j.surfcoat.2021.127291 ↗
3. Laser polishing of additive manufactured 316L stainless steel synthesized by selective laser melting10.3390/ma12060991 ↗
4. Design Surfaces by Laser Remelting
5. Fragmentation and branch elimination of primary α′ martensite in additively manufactured Ti-6Al-4V alloy10.3390/met13121983 ↗
6. Laser polishing of additive manufactured Ti alloys10.1016/j.optlaseng.2017.02.005 ↗
7. Laser polishing of Ti6Al4V fabricated by selective laser melting10.3390/met10020191 ↗
8. Laser polishing of selective laser melted components10.1016/j.ijmachtools.2015.05.002 ↗
9. Role of Titanium in Bio Implants and Additive Manufacturing: An Overview
10. Influence of surface asperity made by selective laser melting additive manufacturing on bioactivity in rat femur
11. Processing of Ti-5553 with improved mechanical properties via an in-situ heat treatment combining selective laser melting and substrate plate heating10.1016/j.matdes.2017.05.010 ↗
12. Evaluation of microstructure and mechanical properties of additively manufactured Ti–5V–5Mo-5Al-3Cr alloy10.1016/j.msea.2024.146932 ↗
13. Towards uniform and enhanced tensile ductility of additively manufactured Ti−5Al−5Mo−5V−3Cr alloy through designing gradient interlayer deposition time10.1016/j.scriptamat.2022.115066 ↗
14. Detecting near-surface sub-millimeter voids in additively manufactured Ti-5V-5Al-5Mo-3Cr alloy using a transmit-receive eddy current probe10.3390/s24134183 ↗
15. Processing of a metastable titanium alloy (Ti-5553) by selective laser melting10.1016/j.asej.2016.11.004 ↗
16. Thermophysical properties of additively manufactured Ti-5553 alloy10.1016/j.addma.2023.103769 ↗
17. Microstructural characterisation and mechanical properties of Ti-5Al-5V-5Mo-3Cr built by wire and arc additive manufacture10.1080/14786435.2022.2113470 ↗
18. Deep cryogenic and thermal aging treatments of Ti–5Al–5Mo–5V–3Cr alloy additively manufactured by powder bed fusion–laser beam10.1002/adem.202400751 ↗
19. Electron beam powder bed fusion manufacturing of a Ti-5Al-5Mo-5V-3Cr alloy: A microstructure and mechanical properties’ correlation study10.1007/s40964-022-00338-y ↗
20. Influence of α case and transition zone microstructures on tensile properties in laser powder bed fused and heat-treated Ti-5553 parts10.1016/j.matchar.2023.112834 ↗
21. Effects of post heat treatment on microstructure and mechanical properties of Ti5553 parts made by laser powder bed fusion10.1016/j.jallcom.2022.168616 ↗
22. Ti–5Al–5Mo–5V–3Cr bone implants with dual-scale topography: A promising alternative to Ti–6Al–4V10.1088/1361-6528/ab79ac ↗
23. Influence of processing parameters on density, surface morphologies and hardness of as-built Ti-5Al-5Mo-5V-3Cr alloy manufactured by selective laser melting10.1016/j.jallcom.2022.164760 ↗
24. Optimisation of the laser polishing for laser-powder bed fusion and electron beam-powder bed fusion Ti6Al4V surfaces10.1016/j.surfcoat.2024.130935 ↗
25. Temperature-Dependence corrosion behavior of Ti6Al4V in the presence of HCl10.3389/fmats.2022.880702 ↗
26. Influence of niobium and zirconium alloying additions on the anodic dissolution behavior of activated titanium in HCl solutions10.1149/1.1337605 ↗
27. ω-assisted nucleation and growth of α precipitates in the Ti–5Al–5Mo–5V–3Cr–0.5Fe β titanium alloy10.1016/j.actamat.2009.01.007 ↗
28. The evolution of microstructure and mechanical properties of Ti–5Al–5Mo–5V–2Cr–1Fe during ageing10.1016/j.jallcom.2015.01.005 ↗
29. Β phase decomposition in Ti–5Al–5Mo–5V–3Cr10.1016/j.actamat.2009.04.031 ↗