Microstructure and corrosion resistance of hybrid additively manufactured Ti-6Al-4V via laser powder bed fusion
Abstract Over the last decade, the Hybrid Additive Manufacturing (HAM) approach has been introduced to synergistically combine the design flexibility of Additive Manufacturing (AM) with the larger build volume and faster production rates offered by conventional manufacturing methods. In this work, T...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1038/s41598-025-16282-0 |
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| Summary: | Abstract Over the last decade, the Hybrid Additive Manufacturing (HAM) approach has been introduced to synergistically combine the design flexibility of Additive Manufacturing (AM) with the larger build volume and faster production rates offered by conventional manufacturing methods. In this work, Ti-6Al-4V powder was printed on the conventional machined Ti-6Al-4V substrate by laser powder bed fusion (LPBF), and the corrosion behavior was studied in 3.5 wt.% NaCl and 0.5 M H2SO4 solutions. The multi-material part’s interface characteristics, microstructure, and microhardness properties were investigated. In addition, the corrosion behaviors of the LPBF, hybrid, and substrate Ti-6Al-4V parts were characterized, with subsequent analysis of the bimetallic structure’s corroded surface morphology and composition. The corrosion behavior across all samples in each solution followed similar trends with minor variations. However, the hybrid component with strong and defect-free interfacial bonding demonstrates the feasibility of HAM in maintaining comparable corrosion performance to that of individual materials. Microstructural features of Ti-6Al-4V, including grain morphology, phase fraction, and oxide layer formation, tend to substantially influence corrosion resistance in saline and acidic environments. |
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| ISSN: | 2045-2322 |