Comparative Studies of Cr/Ti Additions for Cu40Mn25Al20Fe5Ni5 HEA on Microstructure and Corrosion Behavior in HNO3 Solution

被引：0
作者：
Lamiaa Z. Mohamed
Khaled A. Abdelghafar
Hayam A. Aly
Ghalia A. Gaber
机构：
[1] Cairo University,Mining, Petroleum, and Metallurgical Engineering Department, Faculty of Engineering
[2] Central Metallurgical Research and Development Institute (CMRDI),Metal Casting Lab
[3] Suez University,Department of Metallurgical and Materials Engineering, Faculty of Petroleum and Mining Engineering
[4] Al-Azhar University,Department of Chemistry, Faculty of Science (Girls)
[5] Yousef Abbas St,undefined
来源：
International Journal of Metalcasting | 2023年 / 17卷
关键词：
high entropy alloys; Cu-rich HEA; corrosion behavior; microstructure; nitric acid;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The influence of Cr or Ti additions to Cu40Mn25Al20Fe5Ni5 high entropy alloy (HEA) on the microstructure and corrosion behavior in different concentrations of HNO3 solution were investigated. The microstructures of the Cu-rich HEAs are characterized and analyzed. Microstructural analysis of the HEAs indicates the formation of a dendritic structure. Also, the phases are identified by using X-ray diffraction (XRD). The corrosion behavior of the investigated HEAs in the HNO3 solution was studied. The corrosion rate (CR) for Cu40Mn25Al20Fe5Ni5Ti5 HEA (Ti5 HEA) has a lower value than Cu40Mn25Al20Fe5Ni5Cr5 HEA (Cr5 HEA). The morphology of the corroded HEAs was investigated by using SEM images, EDX analysis, and mapping for elemental distribution. Cr addition led to the formation of a Cr2O3 protective film on the dendrites. However, the Ti5 HEA has a good surface morphology with a homogenous distribution than Cr5 HEA which is associated with a decrease in the corrosion rate.
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页码：1791 / 1805
页数：14
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