评价等原子Ni-Al-Co-Fe-Mn-Ti-Cr高熵合金在氧化和非氧化环境下热处理的显微组织变化和硬度

IF 2 Q3 ENGINEERING, MANUFACTURING

Manufacturing Letters Pub Date : 2025-08-01 DOI:10.1016/j.mfglet.2025.06.048

Emmanuel Olorundaisi, Peter A. Olubambi

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引用次数: 0

摘要

研究了等原子Ni-Al-Co-Fe-Mn-Ti-Cr高熵合金（HEA）在氧化和非氧化环境下热处理的显微组织变化和硬度行为。样品在700 °C的温度下退火4小时。显微组织显示形成了一种精细的颗粒状和针状共晶相，其平均尺寸。在氧化环境中热处理的样品表面观察到氧化层。热处理后的样品的延展性得到了改善，硬度值从未热处理的136.3 HV下降到氧化和非氧化环境下的98.1和92.8 HV。热处理结果可以被认为是生产高性能HEAs的有前途的方法，特别是在先进的工程应用中。

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Evaluating microstructural changes and hardness in equal atomic Ni-Al-Co-Fe-Mn-Ti-Cr high-entropy alloy subjected to heat treatment in oxidative and non-oxidative environments

Microstructural changes and hardness behaviour of equal atomic Ni-Al-Co-Fe-Mn-Ti-Cr High-Entropy Alloy (HEA) subjected to heat treatment in oxidative and non-oxidative environments were investigated. The samples were annealed for four hours at a temperature of 700 °C. The microstructure revealed the formation of a well-refined granular and needle-like eutectic phase with an average size. An oxidized layer was observed on the surface of the sample heat-treated in an oxidized environment. The heat-treated samples exhibited improved ductility with a drop in hardness value from 136.3 HV for the non-heat-treated to 98.1 and 92.8 HV for the heat-treated in an oxidized and non-oxidized environment, respectively. The heat treatment results can be considered a promising approach for producing high-performance HEAs, particularly for advanced engineering applications.

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