典型文献
Microstructure and mechanical properties of as-cast (CuNi)100-xCox medium-entropy alloys
文献摘要：
Microstructure and mechanical properties of non-equiatomic (CuNi)100-xCox (x=15, 20, 25 and 30, at.％) medium-entropy alloys (MEAs) prepared by vacuum arc-melting were investigated. Results show that all the as-cast MEAs exhibit dual face-centered cubic (fcc) solid-solution phases with identical lattice constant, showing typical dendrite structure consisting of (Ni, Co)-rich phase in dendrites and Cu-rich phase in inter-dendrites. The positive enthalpy of mixing among Cu and Ni-Co elements is responsible for the segregation of Cu. With the increase of Co content, the volume fraction of (Ni, Co)-rich phase increases while the Cu-rich phase decreases, resulting in an increment of yield strength and a decrement of elongation for the (CuNi)100-xCox MEAs. Nano-indentation test results show a great difference of microhardness between the two fcc phases of the MEAs. The measured microhardness value of the (Ni, Co)-rich phase is almost twofold as compared to that of the Cu-rich phase in all the (CuNi)100-xCox MEAs. During the deformation of the MEAs, the Cu-rich phase bears the main plastic strain, whereas the (Ni, Co)-rich phase provides more pronounced strengthening.
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作者姓名：
Zhi-yong Yang;Wei-ping Chen;Liang-yan Hao;Chen-liang Chu;Da-hai Zeng;Wei Xiong;Zhi-qiang Fu
作者机构：
Guangdong Key Laboratory for Advanced Metallic Materials Processing,South China University of Technology,Guangzhou 510640,China;National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510640,China;Physical Metallurgy and Materials Design Laboratory,Department of Mechanical Engineering and Materials Science,University ofPittsburgh,Pittsburgh,PA,15261,USA
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引用格式：
[1]Zhi-yong Yang;Wei-ping Chen;Liang-yan Hao;Chen-liang Chu;Da-hai Zeng;Wei Xiong;Zhi-qiang Fu-.Microstructure and mechanical properties of as-cast (CuNi)100-xCox medium-entropy alloys)[J].中国铸造,2022(06):511-518
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0.494171
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