Microstructural Transition of (CuFeMnNi)(1-x)Cr-x (x=0-0.25) High-Entropy Alloys
Microstructural Transition of (CuFeMnNi)(1-x)Cr-x (x=0-0.25) High-Entropy Alloys
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(CuFeMnNi)(1-x)Cr-x (x=0-0.25)高熵合金的显微组织转变
DOI：
10.1007/s11665-019-04171-3
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发表时间：
2019
影响因子：
2.3
通讯作者：
Yin Fucheng
中科院分区：
文献类型：
--
作者：
Chen Xu;Zhai Sudan;Gao Di;Xu Jing;Liu Ye;Liu Yang;Yin Fucheng
系统研究了铬对(CuFeMnNi)1−xCrx(x= 0，0.0 5，0.1，0.15，0.2和0.2 5)高熵合金铸态和退火态组织和硬度的影响。结果表明：(CuFeMnNi)1−xCrx(x= 0，0.0 5和0.1)合金的显微组织由富(Fe，Ni，Cr)的fcc1和富(Cu，Mn)的fcc2相组成。铸态和相关退火态合金的枝晶尺寸没有明显变化，表明所研究的合金具有良好的热结构稳定性。铸态(CuFeMnNi)1−xCrx(x= 0.15、0.2和0.2 5)合金的显微组织由fcc1、fcc2和富(Cr，Fe)的体心立方相组成，而退火态合金由fcc1、fcc2和ρ相组成。检测到了体心立方相向ρ相的显著转变。此外，铸态和退火态(CuFeMnNi)1−xCrx合金的硬度均随铬含量的增加而增加。与铸态合金相比，(CuFeMnNi)1−xCrx(x= 0，0.0 5和0.10)合金的硬度略有下降，而(CuFeMnNi)1−xCrx(x= 0.15，0.2和0.2 5)合金的硬度有所提高。
The influence of Cr on the microstructure and hardness of the cast and annealed (CuFeMnNi)1−xCrx(x= 0, 0.05, 0.1, 0.15, 0.2 and 0.25) high-entropy alloys were investigated systematically. The results revealed that the microstructures of (CuFeMnNi)1−xCrx(x= 0, 0.05 and 0.1) alloys were composed of (Fe, Ni and Cr)-rich FCC1 and (Cu, Mn)-rich FCC2 phases. No obvious change in the dendritic size was detected between cast and related annealed alloys, indicating the excellent thermal structure stability of the studied alloys. The microstructures of the cast (CuFeMnNi)1−xCrx(x= 0.15, 0.2 and 0.25) alloys contained FCC1, FCC2 and (Cr, Fe)-rich BCC phases, while those of the annealed alloys were composed of FCC1, FCC2 andρphases. The significant transition from BCC phase toρphase was detected. Moreover, the hardness of both cast and annealed (CuFeMnNi)1−xCrxalloys increased with the increasing Cr content. The hardness of annealed (CuFeMnNi)1−xCrx(x= 0, 0.05 and 0.10) alloys reduced slightly as compared to corresponding cast alloys, whereas the hardness of the annealed (CuFeMnNi)1−xCrx(x= 0.15, 0.2 and 0.25) alloys increased.