About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials
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Presentation Title |
Nano-Treated Aluminum Alloy 2024 with Exceptional Strength and Ductility via Laser Powder Bed Fusion |
Author(s) |
Tianqi Zheng, Guan-Cheng Chen, Bingbing Li, Xiaochun Li |
On-Site Speaker (Planned) |
Tianqi Zheng |
Abstract Scope |
Laser powder bed fusion (LPBF) of aluminum alloy 2024 (AA2024) has become extremely desirable since AA2024 offers high specific-strength for widespread applications that require complex geometries. However, its tendency for hot-cracking has largely prevented its fabrication by LPBF. Here, with nano-treating technology, where AA2024 powders with internally dispersed 1vol.% TiC nanoparticles (AA2024-NT), and laser double-scanning process, dense, crack-free AA2024-NT samples with ultrafine cellular structures have been successfully manufactured. The mechanical properties are exceptional for as-print and post heat treatment state. The as-print AA2024-NT provides a yield strength (YS) of 376 MPa, ultimate tensile strength (UTS) of 486 MPa, and elongation over 15%. After T4 heat treatment, the YS and UTS is further enhanced to 442 MPa and 550 MPa, respectively, while its elongation remains at 12%. This study has achieved higher strength compared not only than its traditional T4 and T6 wrought counterparts, but also previous AA2024 3D printing results. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |