Microstructural evolution and grain-growth kinetics of Al0.2CoCrFeNi high-entropy alloy

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-09-29 DOI:10.1080/09500839.2021.1975056

Srinivas Dudala, Chenna Krishna S, Rajesh Korla

引用次数: 1

Abstract

ABSTRACT Grain-growth kinetics of high-entropy, single-phase, face-centred cubic (FCC) Al0.2CoCrFeNi alloy was studied by isothermal annealing over a wide temperature range for different time intervals. Both optical and EBSD studies show a significant amount of annealing twins. Data were analysed using classical grain-growth models and the activation energy was estimated using the Arrhenius type equation. The grain-growth exponent was found to be n = 3 and the measured activation energy for grain growth was 190 ± 15 kJ mol−1. Significant resistance to grain growth was observed at 1100°C. Microstructural characterisation tools like EBSD, along with nanoindentation, was used to understand the observed behaviour.

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Al0.2CoCrFeNi高熵合金的组织演变和晶粒生长动力学

摘要采用宽温度范围、不同时间间隔的等温退火方法，研究了高熵单相面心立方（FCC）Al0.2CoCrFeNi合金的晶粒生长动力学。光学和EBSD研究都显示了大量的退火孪晶。使用经典的晶粒生长模型分析数据，并使用Arrhenius型方程估计活化能。发现晶粒生长指数为n = 3，测得的晶粒生长活化能为190 ± 15 kJ mol−1。在1100°C时观察到对谷物生长的显著抗性。使用EBSD等微观结构表征工具以及纳米压痕来了解观察到的行为。

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

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.