Correlation between the nanomechanical characteristic and the phase transformation of BCC-based high entropy alloys produced via powder metallurgy

被引：5
作者：
Lee, Hansung [1 ]
Sharma, Ashutosh [2 ]
Kim, Minsu [1 ]
Ahn, Byungmin [1 ,2 ,3 ,4 ]
机构：
[1] Ajou Univ, Dept Energy Syst Res, Suwon, South Korea
[2] Ajou Univ, Dept Mat Sci & Engn, Suwon, South Korea
[3] Ajou Univ, Dept Energy Syst Res, Suwon 16499, South Korea
[4] Ajou Univ, Dept Mat Sci & Engn, Suwon 16499, South Korea
来源：
POWDER METALLURGY | 2023年 / 66卷 / 05期
基金：
新加坡国家研究基金会;
关键词：
High entropy alloy; multiphase; compression; nanoindentation; mechanical alloying; thermodynamic parameter; MECHANICAL-PROPERTIES; VANADIUM ADDITION; MICROSTRUCTURE; TEMPERATURE; CU; BEHAVIOR; PRECIPITATION; STABILITY; EVOLUTION; STRENGTH;
D O I：
10.1080/00325899.2023.2225284
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In this study, the effects of Cu addition on AlFeMnTiSi0.75Cux (x = 0, 0.25, 0.5, 0.75, 1.00; in molar ratios) high entropy alloys (HEAs) prepared via mechanical alloying and spark plasma sintering were investigated. The structure, phase, morphology and composition of HEA powders were analysed and the results revealed that the AlFeMnTiSi0.75Cux HEAs exhibited a multiphase structure. Additionally, after sintering at 900 & DEG;C, the formation of BCC, & mu; and L2(1) phases in the densified HEAs was enhanced. The investigation of the hardness, nanoindentation and compressive properties revealed that the microstructural and mechanical properties of AlFeMnTiSi0.75Cux HEAs were improved at the optimal Cu fraction (0.25 molar ratio). The nanoindentation results revealed that the AlFeMnTiSi0.75Cux HEAs exhibited the highest hardness and elastic modulus (H-IT = 19.2 GPa, E-IT = 336 GPa). These results improve the current understanding of multiphase HEAs and may pave way for the development of advanced HEAs with superior mechanical properties.
引用
收藏
页码：669 / 678
页数：10
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