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Mierzejewska I., Durejko T.♦, Antolak-Dudka A.♦, Zasada D.♦, Kopeć M., Unravelling enhanced mechanical properties of LENS-manufactured Ti-5553 alloy through interlayer dwell control without post-processing heat treatment,
JOURNAL OF ALLOYS AND COMPOUNDS, ISSN: 0925-8388, DOI: 10.1016/j.jallcom.2025.182893, No.182893, pp.1-18, 2025 Abstract:
Near-β titanium alloys such as Ti–5Al–5Mo–5V–3Cr (Ti-5553) are widely applied in aerospace and automotive industries due to their high strength and fracture toughness. While additive manufacturing (AM) via Laser Engineered Net Shaping (LENS) provides design flexibility for such alloys, their mechanical properties are directly dependent on extensive post-processing. This study demonstrates that the introduction of a 26-second interlayer dwell time during LENS fabrication enables in-situ microstructural tailoring, resulting in a distinctive α/β structure with Widmanstätten features and thus, eliminating the need for further heat treatment. The as-built Ti-5553 alloy achieved a superior combination of yield strength (1198 MPa) and ductility (16%), outperforming both heat-treated and conventionally processed counterparts. Comparative annealing at 300 °C, 700 °C, and 750 °C led to moderate changes in strength or ductility thus proving that the as-built condition is characterized by the most balanced performance. These findings highlights, that the proper interlayer dwell time selection enable achieving application-ready mechanical properties in β-Ti alloys directly from the AM process. Keywords:
Ti-5553 titanium alloy,β-Ti alloys,Direct Energy Deposition (DED),Microstructure Affiliations:
| Mierzejewska I. | - | IPPT PAN | | Durejko T. | - | other affiliation | | Antolak-Dudka A. | - | other affiliation | | Zasada D. | - | other affiliation | | Kopeć M. | - | IPPT PAN |
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