气体氮化后 HfNbTaTiZr 高熵难熔合金的结构和力学性能表征

IF 4.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Intermetallics Pub Date : 2024-04-06 DOI:10.1016/j.intermet.2024.108279

Yunus Alphan , Mertcan Kaba , Amir Motallebzadeh , Huseyin Cimenoglu

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引用次数: 0

摘要

本研究旨在通过在中温（600 °C）下气体氮化 3 小时，提高 HfNbTaTiZr 难熔高熵合金（RHEA）的表面硬度和耐磨性。利用配备扫描电子显微镜（SEM）的 X 射线衍射仪（XRD）、X 射线光电子能谱（XPS）和能量色散光谱（EDS）进行的结构表征显示，氮化可形成 1.5 μm 厚的表层，其中含有合金元素的氧化物和氮化物沉淀。表面层中发现氧化物的原因是氮化气氛中存在残余氧气。尽管如此，与未处理状态相比，采用气体氮化的耐刮擦性显著提高，这是表面硬度增加和产生较大压缩残余应力的结果。

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Characterization of structural and mechanical properties of HfNbTaTiZr refractory high entropy alloy after gas nitriding

This study was initiated to improve surface hardness and wear resistance of a HfNbTaTiZr refractory high entropy alloy (RHEA) by gas nitriding at a medium temperature (600 °C) for 3 h. Structural characterizations conducted by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS) equipped scanning electron microscope (SEM) revealed that nitriding led to formation of a 1.5 μm thick surface layer containing precipitates of oxides and nitrides of the alloying elements. Detection of oxides within the surface layer was attributed to the presence residual oxygen in the nitriding atmosphere. Nevertheless, the employed gas nitriding provided remarkably higher scratch resistance compared to the untreated state, as the results of increment in the surface hardness and development of larger compressive residual stress.

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来源期刊

Intermetallics 工程技术-材料科学：综合

CiteScore

7.80

自引率

9.10%

发文量

291

审稿时长

37 days

期刊介绍： This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys. The journal reports the science and engineering of metallic materials in the following aspects: Theories and experiments which address the relationship between property and structure in all length scales. Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations. Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties. Technological applications resulting from the understanding of property-structure relationship in materials. Novel and cutting-edge results warranting rapid communication. The journal also publishes special issues on selected topics and overviews by invitation only.