Superior thermal stability in a high-strength Al–Zn–Mg–Cu–Si alloy via tailored precipitation sequence
Year: 2025
Type: article
Abstract: 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.
Source: Materials Research Letters
Authors: Yuan-Ting Mo, X.Y. Xu, Ze-Tian Liu, Hai-Xiao Zhang, Cheng Wang, Xu Liu, Shen-Bao Jin, Hui-Yuan Wang
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,459
Awards: G1637787515, G7521019852
OpenAlex ID: W4409157957