500和900°C退火对AlCoCrFeNi合金结构及力学性能的影响

The Influence of Annealing at 500 and 900 °C on the Structure and Mechanical Properties of AlCoCrFeNi Alloys.

作者信息

Tokarewicz Marzena, Grądzka-Dahlke Małgorzata, Rećko Katarzyna, Łępicka Magdalena

机构信息

Department of Materials and Production Engineering, Faculty of Mechanical Engineering, Bialystok University of Technology, ul. Wiejska 45 C, 15-351 Białystok, Poland.

Faculty of Physics, University of Bialystok, K. Ciołkowskiego 1L, 15-245 Białystok, Poland.

出版信息

Materials (Basel). 2023 Feb 1;16(3):1245. doi: 10.3390/ma16031245.

DOI:10.3390/ma16031245

PMID:36770251

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9919201/

Abstract

The AlCoCrFeNi high-entropy alloy is sensitive to heat treatment. The aim of the present study was to test a similar correlation for AlCoCrFeNi alloys with less than equimolar aluminum content. This paper presents a study of the annealing effect on the structure and mechanical properties of selected alloys. AlCoCrFeNi alloys (x = 0, 0.5, 0.7) were fabricated by the induction melting method. The obtained specimens were annealed at 500 °C and 900 °C. A detailed study of the changes in crystalline structure due to annealing was conducted. Three-point bending and hardness tests were carried out for the as-cast and annealed specimens to determine selected mechanical properties. The study confirmed that increasing the aluminum content in the AlCoCrFeNi alloy improves mechanical properties. For the alloy with aluminum content x = 0.7, hardness increased by 187% and yield strength by 252% compared to the alloy without aluminum. A significant effect of annealing on the crystalline structure of the AlCoCrFeNi alloy was found, but this was not followed by changes in mechanical properties.

摘要

AlCoCrFeNi高熵合金对热处理敏感。本研究的目的是测试铝含量低于等摩尔的AlCoCrFeNi合金的类似相关性。本文介绍了对选定合金的退火对其结构和力学性能影响的研究。通过感应熔炼法制备了AlCoCrFeNi合金（x = 0、0.5、0.7）。将所得试样在500℃和900℃下退火。对退火引起的晶体结构变化进行了详细研究。对铸态和退火试样进行了三点弯曲和硬度测试，以确定选定的力学性能。研究证实，增加AlCoCrFeNi合金中的铝含量可改善力学性能。与不含铝的合金相比，铝含量x = 0.7的合金硬度提高了187%，屈服强度提高了252%。发现退火对AlCoCrFeNi合金的晶体结构有显著影响，但这并未伴随着力学性能的变化。