About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Lightweight Alloy Matrix Composites
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| Presentation Title |
Simultaneous Enhancement of Printability and Mechanical Properties in Ti-Modified Al-Zn-Mg-Cu Alloy Fabricated by Laser Powder Bed Fusion (L-PBF) |
| Author(s) |
Dong-Min Jang, Soobin Kim, Ma-Tea Lee, Jungho Choe, Kyung Tae Kim, Byeong-Joo Lee, Kee-Ahn Lee |
| On-Site Speaker (Planned) |
Dong-Min Jang |
| Abstract Scope |
Despite its excellent mechanical properties, high-strength Al-Zn-Mg-Cu alloy (Al7075) faces challenges in Laser Powder Bed Fusion (L-PBF) due to hot cracking. This study proposes an approach to overcome these limitations by adding titanium (Ti) to improve the L-PBF printability of the Al7075 alloy. The addition of Ti promoted the formation of a fine-grained microstructure through nanoscale Al₃Ti particles, thereby enhancing the solidification behavior and effectively suppressing the formation of hot cracks. The Ti-modified alloy achieved over 99.7% relative density and significantly reduced crack susceptibility. In the as-built condition, it showed a yield strength of 339.7 MPa, an ultimate tensile strength of 440.2 MPa, and an elongation of 12.16%. After T6 heat treatment, mechanical properties improved further to 358.8 MPa (YS), 460.8 MPa (UTS), and 14.45% elongation. Microstructural analysis confirmed that grain refinement, precipitation hardening, and improved solidification characteristic collectively contributed to these enhanced properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |