Effect of amplitude on microstructure and properties of hot oscillating pressure sintering AlCoCrNiFe high-entropy alloys

IF 2.6 3区材料科学 Q2 ENGINEERING, MANUFACTURING

International Journal of Material Forming Pub Date : 2026-09-21 DOI:10.1007/s12289-026-01986-z

Ka Gao, Yuan Rao, Teng Fang, Yuhang Han, Yufan Tang, Wei Chen, Ziheng Gao, Furong Xie, Bin Chen, Chuan Li

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引用次数: 0

Abstract

This work employs the hot oscillatory pressure (HOP) sintering technique for the first time to prepare AlCoCrNiFe high-entropy alloy at varying amplitudes, systematically investigating the influence of amplitude on their microstructure and properties. As the amplitude increased, the grain boundaries of HOP sintered alloy were disappeared, and significant improvements in density and microstructural uniformity were observed. Specifically, when the amplitude increased from ± 1 to ± 10 MPa, the density of the HOP sintered alloy was rose from 93.65% to 99.11%, achieving near-complete densification. The increased amplitude also effectively enhanced their hardness and corrosion resistance. At an amplitude of ± 10 MPa, the Vickers hardness of the HOP sintered AlCoCrNiFe high-entropy alloy was reached a maximum of 481.52 HV₁, which was significantly higher than that of the hot-press sintered samples. Moreover, its corrosion current density was minimized at 9.1 µA/cm², indicating the strongest corrosion resistance. The research results demonstrate that the increasing the HOP amplitude can produce high-entropy alloys with high density, well hardness, and excellent corrosion resistance in lower temperature.

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振幅对热振荡压力烧结AlCoCrNiFe高熵合金组织和性能的影响

本文首次采用热振荡压力（HOP）烧结技术制备了变振幅下的AlCoCrNiFe高熵合金，系统地研究了振幅对其组织和性能的影响。随着振幅的增大，HOP烧结合金的晶界逐渐消失，密度和组织均匀性显著提高。当振幅从±1 MPa增加到±10 MPa时，HOP烧结合金的密度从93.65%提高到99.11%，接近完全致密化。振幅的增加也有效地提高了材料的硬度和耐蚀性。在±10 MPa振幅下，HOP烧结AlCoCrNiFe高熵合金的维氏硬度达到最大值481.52 HV1，显著高于热压烧结试样。腐蚀电流密度最小，为9.1µA/cm²，耐蚀性最强。研究结果表明，增大HOP振幅可以制备出密度高、硬度好、耐低温腐蚀性能优异的高熵合金。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Material Forming ENGINEERING, MANUFACTURING-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.10

自引率

4.20%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal publishes and disseminates original research in the field of material forming. The research should constitute major achievements in the understanding, modeling or simulation of material forming processes. In this respect ‘forming’ implies a deliberate deformation of material. The journal establishes a platform of communication between engineers and scientists, covering all forming processes, including sheet forming, bulk forming, powder forming, forming in near-melt conditions (injection moulding, thixoforming, film blowing etc.), micro-forming, hydro-forming, thermo-forming, incremental forming etc. Other manufacturing technologies like machining and cutting can be included if the focus of the work is on plastic deformations. All materials (metals, ceramics, polymers, composites, glass, wood, fibre reinforced materials, materials in food processing, biomaterials, nano-materials, shape memory alloys etc.) and approaches (micro-macro modelling, thermo-mechanical modelling, numerical simulation including new and advanced numerical strategies, experimental analysis, inverse analysis, model identification, optimization, design and control of forming tools and machines, wear and friction, mechanical behavior and formability of materials etc.) are concerned.