具有分层组织长度尺度的镍钴基共晶高熵合金(NiCo)1.7AlCrFe的设计

IF 1.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Pub Date : 2023-07-01 DOI:10.1080/14786435.2023.2227793

R. Vikram, K. Dash, Shanmukha Kiran Aramanda, S. Suwas

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引用次数: 0

摘要

摘要基于价电子浓度(VEC)设计了镍钴基复合共晶高熵合金(Ni-Co-based HEA)。制备的合金组织由面心立方(FCC)和有序立方(B2)两种结构组成，并通过CALPHAD进行了验证。微观结构具有微米级(片层共晶形貌)和纳米级(B2长度尺度)的分层结构。过饱和FCC初相中有B2相析出。相间的取向关系表现出强烈的Kurdjimov-Sachs (KS)型取向关系，是FCC/BCC界面结构的典型特征。该EHEA在室温下具有良好的屈服强度，在10−3 ~ 10−1应变速率范围内应变速率不敏感。图形抽象

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Design of a nickel–cobalt based eutectic high entropy alloy (NiCo)1.7AlCrFe with hierarchical microstructural length scales

ABSTRACT A combined nickel–cobalt-based eutectic high entropy alloy (Ni-Co-based HEA) has been designed based on the valence electron concentration (VEC) value. The microstructure of the developed alloy consists of a face-centered cubic (FCC) and ordered cubic (B2) structure, which was validated using CALPHAD. The microstructure is hierarchical with length scales in micrometers (lamellar eutectic morphology) and nanometers (B2 length scale). B2 phase precipitation was observed in the supersaturated FCC primary phase. The orientation relationship (OR) between the phases exhibited a strong Kurdjimov-Sachs (KS) type OR, typical of FCC/BCC interface structures. This EHEA displayed good yield strength at room temperature and strain rate insensitivity in the 10−3–10−1 strain rate range. GRAPHICAL ABSTRACT

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来源期刊

Philosophical Magazine 工程技术-材料科学：综合

自引率

0.00%

发文量

审稿时长

4.7 months

期刊介绍： The Editors of Philosophical Magazine consider for publication contributions describing original experimental and theoretical results, computational simulations and concepts relating to the structure and properties of condensed matter. The submission of papers on novel measurements, phases, phenomena, and new types of material is encouraged.