Superior thermal stability in a high-strength Al–Zn–Mg–Cu–Si alloy via tailored precipitation sequence
Here, a novel Al–Zn–Mg–Cu–Si alloy is developed, combining a high yield strength of ∼420 MPa with excellent thermal stability. This exceptional performance is achieved through a tailored precipitation sequence enabled by a multi-step aging strategy. The first aging step at 80 °C plays a crucial role in promoting the formation of dense Mg–Zn–(Cu) clusters. Ultimately, the Al alloy exhibits a high density of fine strengthening precipitates, while attaining a substantial density of thermally stable QP2 phases. This strategy overcomes the trade-off between strength and thermal stability, offering a promising approach for high-strength Al alloys.
Authors
- Shenbao Jin (ORCID: https://orcid.org/0000-0002-7891-5556)
- Haixiao Zhang (ORCID: https://orcid.org/0000-0001-8686-6849)
- Cheng Wang (ORCID: https://orcid.org/0000-0001-7653-3100)
- Yuan–Ting Mo
- Xiaoyi Xu (ORCID: https://orcid.org/0000-0002-7372-9287)
- Zetian Liu (ORCID: https://orcid.org/0000-0001-9960-2260)
- Xu Liu (ORCID: https://orcid.org/0000-0003-0773-9951)
- Hui–Yuan Wang (ORCID: https://orcid.org/0000-0003-3671-9159)
Institutions
- Hebei University of Technology (CN)
- Jilin University (CN)
- Jilin Medical University (CN)
- University of Hong Kong (HK)
Publication Details
- Journal
- Materials Research Letters
- Published
- 2025-04-03
- DOI
- https://doi.org/10.1080/21663831.2025.2475243
- Citations
- 8
- Primary Topic
- Aluminum Alloy Microstructure Properties
- Type
- article
- Field-Weighted Citation Impact
- 39.95
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China