Tensile properties and molecular dynamics simulation of FeCrMnAlxCu high-entropy alloys

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

Vacuum Pub Date : 2025-03-06 DOI:10.1016/j.vacuum.2025.114219

Li Feng , Ruilong Liu , Kai Ma , Yanchun Zhao , Xuan Fu , Xian Zhang , Yajun Ling , Jun Li

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引用次数: 0

Abstract

High-entropy alloys with the composition FeCrMnAl_xCu (where x = 0, 0.1, 0.25, 0.5, 0.75, and 1.0) were synthesized utilizing vacuum arc melting techniques followed by Cu mold casting. This study systematically investigated the effects of different Al contents on the microstructure and mechanical properties of these alloys. The microstructural development and characteristics of FeCrMnAl_xCu high-entropy alloys under uniaxial tensile conditions were examined through molecular dynamics simulations. The experimental results indicated that as the Al content increased from 0 to 1.0, the alloy phase structure of the alloy before and after stretching was composed of FCC and BCC phases. Notably, the proportion of the BCC phase increased after stretching, while the dendrite region expanded and the interdendrite region decreased. The tensile strength decreased by 70.44 %, and elongation decreased by 87.14 % as the Al content increased from 0 to 1.0.t Additionally, molecular dynamics simulations revealed that the phase structure changed from the original FCC to a predominantly BCC configuration with increasing Al content. This increase adversely affected the mechanical properties of the FeCrMnAl_xCu high-entropy alloy, thereby leading to a reduction in dislocation density.

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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.