Achieving strength-ductility synergistic improvement in Mg alloy via non-uniform precipitate-induced nanoscale-microzone heterostructure
Nano-precipitate-strengthening often sacrifices ductility in Mg alloys. Herein, we report a novel nanoscale-microzone heterostructure that can yield strength-ductility synergistic improvement. The nanoscale-microzone heterostructure unit is composed of the soft zone with slender sheet-like precipitates along dislocation lines and the hard zone with β’ precipitate arrays on dislocation loops/arrays. The Mg-9.9Gd-0.25Ag-0.19Zr alloy with nanoscale-microzone heterostructure achieves ultra-high strength (YS: 441 MPa, UTS: 475 MPa) and improved uniform elongation (UEl: 6.0%, 7.5 times that before aging treatment). This mechanism based on nanoscale-microzone heterostructure is expected to provide a feasible avenue to develop precipitation-strengthened Mg-RE alloys with ultra-high strength and acceptable elongation.
Authors
- Qiang Yang (ORCID: https://orcid.org/0000-0002-6717-0413)
- Shujuan Liu (ORCID: https://orcid.org/0000-0001-8701-8374)
- Yuying He
- Liyuan Liu (ORCID: https://orcid.org/0000-0002-7050-3792)
- Zehua Li (ORCID: https://orcid.org/0000-0002-5624-5600)
- Zhi Geng (ORCID: https://orcid.org/0000-0001-9662-2784)
- Xin Qiu (ORCID: https://orcid.org/0000-0001-8609-1801)
- Jinghuai Zhang (ORCID: https://orcid.org/0000-0002-0315-4836)
- Ruizhi Wu
- Bin Sun (ORCID: https://orcid.org/0000-0002-5882-5772)
- Hao Gu
Institutions
- Kunming University of Science and Technology (CN)
- Harbin Engineering University (CN)
- Harbin Institute of Technology (CN)
- Changchun Institute of Applied Chemistry (CN)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2025-04-26
- DOI
- https://doi.org/10.1080/21663831.2025.2493898
- Citations
- 23
- Primary Topic
- Magnesium Alloys: Properties and Applications
- Type
- article
- Field-Weighted Citation Impact
- 13.73
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Heilongjiang Province
- Jilin Scientific and Technological Development Program