Improvements of microstructure and mechanical properties of wire-arc directed energy deposition 2024 aluminum alloy after adding TiC nanoparticles
To address issues such as grain coarsening, high porosity, and poor mechanical properties that commonly occur in high-strength 2024 aluminum alloy (AA2024) during directed energy deposition using an electric arc (DED-A), this work proposes a strategy of adding TiC nanoparticles to the AA2024 welding...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-12-01
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| Series: | Virtual and Physical Prototyping |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2024.2442489 |
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| Summary: | To address issues such as grain coarsening, high porosity, and poor mechanical properties that commonly occur in high-strength 2024 aluminum alloy (AA2024) during directed energy deposition using an electric arc (DED-A), this work proposes a strategy of adding TiC nanoparticles to the AA2024 welding wire for DED-A and reveals the mechanism of TiC nanoparticles modification. AA2024 and TiCP/AA2024 composite were fabricated by DED-A. By adding TiC nanoparticles, the average grain diameter of the as-deposited TiCP/AA2024 composites considerably decreases from 65.4 μm to 16.4 μm. TiC nanoparticles refine the grains by promoting nucleation and inhibiting grain growth. Correspondingly, the mechanical properties of the as-deposited TiCP/AA2024 have been significantly improved: the horizontal tensile strength, yield strength, and elongation are 304 , 174 MPa, and 9.5%, respectively, which represent increases of 75%, 70%, and 164% compared to AA2024, and the tensile strength, yield strength, and elongation in the vertical direction are 287 MPa, 165 MPa, and 9.9%, respectively, with no significant anisotropy observed. |
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| ISSN: | 1745-2759 1745-2767 |