Effect of Ti on the microstructure and properties of CoCrCuFeNiTi x high-entropy alloys

Yong Zhang; Xue Fei Wang; Guo Liang Chen; Yi Qiao

doi:10.3166/acsm.31.699-710

Effect of Ti on the microstructure and properties of CoCrCuFeNiTi _x high-entropy alloys

Yong Zhang^*
, Xue Fei Wang
, Guo Liang Chen
, Yi Qiao

^*Corresponding author for this work

University of Science and Technology Beijing

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The changes in microstructure and properties as a result of Ti addition to the CoCrCuFeNi equiatomic alloy system were studied. At low Ti additions, i.e. CoCrCuFeNi and CoCrCuFeNiTi_0.5, the alloys are composed of an FCC solid solution. However, the CoCrCuFeNiTi_0.8 and CoCrCuFeNiTi alloys are composed of an FCC solid solution, a eutectic mixture of FCC and Laves phases (Fe₂Ti type), and a fraction of amorphous phase. The compressive yield strength of the alloys increases from 230 MPa to 1272 MPa in the range of Ti addition considered. The CoCrCuFeNiTi_0.5 alloy exhibits an especially high compressive strength of about 1650 MPa. Additionly, this alloy exhibits extensive work hardening and a large ductility of 22%. An interesting transition from paramagnetism to superparamagnetism was found. This may be attributed to the appearance of nanoparticles embedded within the amorphous phase as a result of Ti content.

Original language	English
Pages (from-to)	699-709
Number of pages	11
Journal	Annales de Chimie: Science des Materiaux
Volume	31
Issue number	6
DOIs	https://doi.org/10.3166/acsm.31.699-710
State	Published - Nov 2006
Externally published	Yes

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title = "Effect of Ti on the microstructure and properties of CoCrCuFeNiTi x high-entropy alloys",

abstract = "The changes in microstructure and properties as a result of Ti addition to the CoCrCuFeNi equiatomic alloy system were studied. At low Ti additions, i.e. CoCrCuFeNi and CoCrCuFeNiTi0.5, the alloys are composed of an FCC solid solution. However, the CoCrCuFeNiTi0.8 and CoCrCuFeNiTi alloys are composed of an FCC solid solution, a eutectic mixture of FCC and Laves phases (Fe2Ti type), and a fraction of amorphous phase. The compressive yield strength of the alloys increases from 230 MPa to 1272 MPa in the range of Ti addition considered. The CoCrCuFeNiTi0.5 alloy exhibits an especially high compressive strength of about 1650 MPa. Additionly, this alloy exhibits extensive work hardening and a large ductility of 22\%. An interesting transition from paramagnetism to superparamagnetism was found. This may be attributed to the appearance of nanoparticles embedded within the amorphous phase as a result of Ti content.",

author = "Yong Zhang and Wang, \{Xue Fei\} and Chen, \{Guo Liang\} and Yi Qiao",

year = "2006",

month = nov,

doi = "10.3166/acsm.31.699-710",

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TY - JOUR

T1 - Effect of Ti on the microstructure and properties of CoCrCuFeNiTi x high-entropy alloys

AU - Zhang, Yong

AU - Wang, Xue Fei

AU - Chen, Guo Liang

AU - Qiao, Yi

PY - 2006/11

Y1 - 2006/11

N2 - The changes in microstructure and properties as a result of Ti addition to the CoCrCuFeNi equiatomic alloy system were studied. At low Ti additions, i.e. CoCrCuFeNi and CoCrCuFeNiTi0.5, the alloys are composed of an FCC solid solution. However, the CoCrCuFeNiTi0.8 and CoCrCuFeNiTi alloys are composed of an FCC solid solution, a eutectic mixture of FCC and Laves phases (Fe2Ti type), and a fraction of amorphous phase. The compressive yield strength of the alloys increases from 230 MPa to 1272 MPa in the range of Ti addition considered. The CoCrCuFeNiTi0.5 alloy exhibits an especially high compressive strength of about 1650 MPa. Additionly, this alloy exhibits extensive work hardening and a large ductility of 22%. An interesting transition from paramagnetism to superparamagnetism was found. This may be attributed to the appearance of nanoparticles embedded within the amorphous phase as a result of Ti content.

AB - The changes in microstructure and properties as a result of Ti addition to the CoCrCuFeNi equiatomic alloy system were studied. At low Ti additions, i.e. CoCrCuFeNi and CoCrCuFeNiTi0.5, the alloys are composed of an FCC solid solution. However, the CoCrCuFeNiTi0.8 and CoCrCuFeNiTi alloys are composed of an FCC solid solution, a eutectic mixture of FCC and Laves phases (Fe2Ti type), and a fraction of amorphous phase. The compressive yield strength of the alloys increases from 230 MPa to 1272 MPa in the range of Ti addition considered. The CoCrCuFeNiTi0.5 alloy exhibits an especially high compressive strength of about 1650 MPa. Additionly, this alloy exhibits extensive work hardening and a large ductility of 22%. An interesting transition from paramagnetism to superparamagnetism was found. This may be attributed to the appearance of nanoparticles embedded within the amorphous phase as a result of Ti content.

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Effect of Ti on the microstructure and properties of CoCrCuFeNiTi _x high-entropy alloys

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