Interfacial segregation enables exceptional high-temperature thermal stability in magnesium alloy

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-04-02 DOI:10.1016/j.vacuum.2025.114311

Jianxin Zhou , Xiaojun Luo , Hong Yang , Yuyang Gao , Wenlong Xie , Zhihua Dong , Bin Jiang , Fusheng Pan

引用次数: 0

Abstract

An advanced design strategy was employed to enhance the thermal stability of Mg-Gd-Y-Zn-Mn alloys by optimizing the distribution of solute atoms at grain boundaries and phase boundaries. The developed Mg-4Gd-6Y-1.5Zn-1Mn alloy demonstrated remarkable yield strength and ultimate tensile strength of 266 MPa and 296 MPa at 300 °C. This exceptional performance can be attributed to the co-segregation of Gd, Y, Zn, Mn atoms at grain boundaries, which effectively mitigated grain coarsening and obstructed dislocation slip across boundaries. Furthermore, the Y and Zn elements segregated at the α-Mn particle boundaries, significantly suppressing the growth of α-Mn particles and promoting the formation of more α-Mn particles. The solute segregation at the α-Mn particle boundaries prevented the α-Mn particles from being sheared and impeding dislocation motion during high-temperature deformation.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.