Electron-ion-plasma boriding of a multilayer nanostructural high-entropy alloy

IF 0.8 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Letters on Materials Pub Date : 2022-12-01 DOI:10.22226/2410-3535-2022-4-433-438

Y. Ivanov, V. Shugurov, E. Petrikova, N. Prokopenko, A. Teresov, O. Tolkachev

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引用次数: 1

Abstract

The structure and properties of a high-entropy alloy (HEA) subjected to saturation with boron atoms by a combined electron-ion-plasma method are characterized. On a HEA film of 5 μm thickness deposited on AISI 304 steel, a film (boron + chromium) with a thickness of 1 μm was deposited and then the system “(Cr + B) film / (HEA film deposited on AISI 304 steel) substrate” was irradiated with a pulsed electron beam. It is shown that the wear resistance of the resulting alloy is more than 30 times higher than that of the original HEA film. The microhardness of the alloy is 10.5 % higher than that of HEA in the initial state. It has been revealed that irradiation of the system with a pulsed electron beam leads to the formation of a multi-element surface alloy of composition (at.%) 5.8Al-11.6Ti-12.9Cr-13.0Fe-2.4Ni-13.1Cu-10.4Zr-8.8Nb, the rest (22 at.%) is oxygen and boron. Thus, seven-element HEA of non-stoichiometric composition, the concentration of metal elements of which varies within (5.8 –13.0) at.%, and additionally containing atoms of nickel, oxygen and boron was formed. It has been established that the high tribological and strength properties of the surface alloy are due to the formation of a multiphase submicron-nanocrystalline structure of high-speed cellular crystallization in the modified layer 6 µm thick. High-speed crystallization is accompanied by alloy delamination with the formation of extended interlayers enriched with copper atoms located along the boundaries of crystallization cells.

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多层纳米结构高熵合金的电子-离子-等离子体渗硼

用电子-离子-等离子体相结合的方法对硼原子饱和的高熵合金（HEA）的结构和性能进行了表征。在沉积在AISI 304钢上的厚度为5μm的HEA膜上，沉积厚度为1μm的膜（硼+铬），然后用脉冲电子束照射系统“（Cr+B）膜/（沉积在AISI 304钢上的HEA）膜”。结果表明，所得合金的耐磨性比原始HEA膜的耐磨性高30倍以上。合金的显微硬度比初始状态下的HEA高10.5%。研究表明，用脉冲电子束辐照该系统可形成成分为5.8Al-11.6Ti-12.9Cr-13.0Fe-2.4Ni-13.1Cu-10.4Zr-8.8Nb的多元素表面合金，其余（22at.%）为氧和硼。因此，形成了非化学计量组成的七元素HEA，其金属元素浓度在（5.8–13.0）at.%范围内变化，并且另外包含镍、氧和硼原子。已经证实，表面合金的高摩擦学和强度性能是由于在6µm厚的改性层中形成了高速细胞结晶的多相亚微米纳米晶体结构。高速结晶伴随着合金分层，沿着结晶室的边界形成富含铜原子的延伸夹层。

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来源期刊

Letters on Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

14.30%

发文量

期刊介绍： The aim of "Letters on materials" is to provide a fast publication of short research and review articles on various topics in materials science and related areas of material physics and mechanics. The editorial board sees it''s own task in rapid informing of the readers on the state-of-the-art challenges and achievements in materials science. The editorial board does its best to select high quality papers reporting new scientific results that are of interest for researchers in materials science, physics, and mechanics. "Letters on materials" invites Russian and foreign researches to publish papers in both the Russian and English languages. The scope of the journal covers the following research areas: structure analysis of materials, mechanical and physical properties of materials, production and processing of materials, experimental methods of investigation of materials, theory and computational methods in solid state physics. "Letters on materials" is designed for researchers, engineers, lecturers, and students working in the areas of materials science, mechanical engineering, metal forming, physics, and material mechanics.