On the heterogeneous microstructure and strengthening mechanisms in a laser welding AZ80 magnesium alloy
This study investigates the microstructural characteristics and mechanical properties of a laser welded AZ80 magnesium alloy. The welding process led to the formation of coarse-grained fusion zone (FZ), where a secondary phase formed continuous network. Mg<sub>17</sub>Al<sub>12</sub> precipitation and coarsening of grain boundaries occurred in the heat affected zone. The welded joint exhibited excellent mechanical properties with a yield strength of 202 MPa and a joint efficiency of 92%. The microstructure analysis via EPMA and EBSD in conjunction with synchrotron X-ray diffraction analysis reveals that precipitates and increased dislocation density in the fusion zone are primary strengthening mechanisms for the laser welded AZ80 Mg alloy.
Authors
- Gaoming Zhu (ORCID: https://orcid.org/0000-0002-3982-4766)
- Dietmar Letzig
- Xiaoqin Zeng (ORCID: https://orcid.org/0000-0002-1466-070X)
- Ning Hao (ORCID: https://orcid.org/0009-0007-1132-9126)
- Ulrich Lienert (ORCID: https://orcid.org/0000-0002-8842-5657)
- Zhifeng Xin (ORCID: https://orcid.org/0000-0001-9080-9695)
- Wei Huang (ORCID: https://orcid.org/0000-0001-7004-6408)
- Sangbong Yi
- Yu Liu
- Yaqi Wang (ORCID: https://orcid.org/0000-0002-6831-9742)
- Jie Wang (ORCID: https://orcid.org/0000-0001-5442-9505)
Institutions
- Kumoh National Institute of Technology (KR)
- Shanghai Jiao Tong University (CN)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Helmholtz-Zentrum Hereon (DE)
- Lenovo (China) (CN)
Publication Details
- Journal
- Scientific Reports
- Published
- 2024-10-03
- DOI
- https://doi.org/10.1038/s41598-024-73767-0
- Citations
- 9
- Primary Topic
- Advanced Welding Techniques Analysis
- Type
- article
- Field-Weighted Citation Impact
- 1.91
Funders
- National Natural Science Foundation of China
- Shanghai Jiao Tong University
- Deutsches Elektronen-Synchrotron