Simultaneously improving strength and ductility of laser-powder-bed-fused Al–Zn–Mg–Cu–Ti alloys by controlling phase structure of Al <sub>3</sub> Ti
Titanium (Ti) addition enabled the laser-powder-bed-fusion (LPBF) fabrication of 7075 (Al–Zn–Mg–Cu) alloys under the heterogeneous nucleation effect of in-situ Al3Ti phase. However, brittle D022 structured Al3Ti easily formed during LPBF, leading to unpleasant tensile properties. In this study, suppression of D022–Al3Ti was explored by adding a small amount of carbon (C) in LPBF Al–Zn–Mg–Cu–Ti alloys. It was found that C addition resulted in 118% improvement in elongation and simultaneous 23% improvement in ultimate tensile strength. The effect of C on the L12 → D022 transformation was studied by aberration-corrected transmission electron microscope and density functional theory.
Authors
- William Yi Wang (ORCID: https://orcid.org/0000-0002-8814-525X)
- Minghao Hou
- Pingxiang Zhang
- Biao Chen (ORCID: https://orcid.org/0000-0002-6428-2639)
- Lei Jia (ORCID: https://orcid.org/0000-0002-2910-4925)
- Jinshan Li (ORCID: https://orcid.org/0000-0002-6894-9760)
- Xin Lin (ORCID: https://orcid.org/0000-0002-7491-8928)
- Zhendong Jia
- Qiaonan Shu
Institutions
- Northwestern Polytechnical University (CN)
- Northwest Institute For Non-Ferrous Metal Research (CN)
- Xi’an University (CN)
- Xi'an University of Technology (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2024-12-19
- DOI
- https://doi.org/10.1080/21663831.2024.2441334
- Citations
- 7
- Primary Topic
- Aluminum Alloy Microstructure Properties
- Type
- article
- Field-Weighted Citation Impact
- 9.09
Funders
- National Natural Science Foundation of China