Cooling rate-dependent microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys

Lili Ma; Cheng Li; Yiling Jiang; Jinlian Zhou; Lu Wang; Fuchi Wang; Tangqing Cao; Yunfei Xue

doi:10.1016/j.jallcom.2016.09.213

Cooling rate-dependent microstructure and mechanical properties of Al_xSi_0.2CrFeCoNiCu_1−xhigh entropy alloys

Lili Ma, Cheng Li, Yiling Jiang, Jinlian Zhou, Lu Wang, Fuchi Wang, Tangqing Cao, Yunfei Xue^*

^*Corresponding author for this work

School of Material Science and Engineering

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

45 Citations (Scopus)

Abstract

The influence of cooling rate on microstructure and mechanical properties of the Al_xSi_0.2CrFeCoNiCu_1−xhigh entropy alloys (HEAs) were investigated. The alloys were prepared by arc melting (the I_xalloys) and injection casting assisted by liquid nitrogen (the R_xalloys). Both the phase structure of I_xand R_xalloys evolved from FCC to FCC + BCC dual-phase, and finally to a BCC phase with an increase in the Al content, and the microstructure transformed from columnar dendrite to equiaxed grain correspondingly. The x range of the R_xalloys with dual-phase structure is smaller than that of the I_xalloys. The R_xalloys also exhibited smaller grain size and spinodal decomposition plate than the I_xalloys. Additionally, because of the microstructure refinement and/or phase structure change, both the hardness and yield stress of R_xalloys were higher than the I_xalloys. The maximum increase rate presented when x = 0.6, and the minimum one presented when x = 0.4.

Original language	English
Pages (from-to)	61-67
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	694
DOIs	https://doi.org/10.1016/j.jallcom.2016.09.213
Publication status	Published - 2017

Keywords

Cooling rate
High-entropy alloys
Mechanical properties
Microstructure

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10.1016/j.jallcom.2016.09.213

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title = "Cooling rate-dependent microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys",

abstract = "The influence of cooling rate on microstructure and mechanical properties of the AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys (HEAs) were investigated. The alloys were prepared by arc melting (the Ixalloys) and injection casting assisted by liquid nitrogen (the Rxalloys). Both the phase structure of Ixand Rxalloys evolved from FCC to FCC + BCC dual-phase, and finally to a BCC phase with an increase in the Al content, and the microstructure transformed from columnar dendrite to equiaxed grain correspondingly. The x range of the Rxalloys with dual-phase structure is smaller than that of the Ixalloys. The Rxalloys also exhibited smaller grain size and spinodal decomposition plate than the Ixalloys. Additionally, because of the microstructure refinement and/or phase structure change, both the hardness and yield stress of Rxalloys were higher than the Ixalloys. The maximum increase rate presented when x = 0.6, and the minimum one presented when x = 0.4.",

keywords = "Cooling rate, High-entropy alloys, Mechanical properties, Microstructure",

author = "Lili Ma and Cheng Li and Yiling Jiang and Jinlian Zhou and Lu Wang and Fuchi Wang and Tangqing Cao and Yunfei Xue",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jallcom.2016.09.213",

language = "English",

volume = "694",

pages = "61--67",

journal = "Journal of Alloys and Compounds",

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T1 - Cooling rate-dependent microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys

AU - Ma, Lili

AU - Li, Cheng

AU - Jiang, Yiling

AU - Zhou, Jinlian

AU - Wang, Lu

AU - Wang, Fuchi

AU - Cao, Tangqing

AU - Xue, Yunfei

PY - 2017

Y1 - 2017

N2 - The influence of cooling rate on microstructure and mechanical properties of the AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys (HEAs) were investigated. The alloys were prepared by arc melting (the Ixalloys) and injection casting assisted by liquid nitrogen (the Rxalloys). Both the phase structure of Ixand Rxalloys evolved from FCC to FCC + BCC dual-phase, and finally to a BCC phase with an increase in the Al content, and the microstructure transformed from columnar dendrite to equiaxed grain correspondingly. The x range of the Rxalloys with dual-phase structure is smaller than that of the Ixalloys. The Rxalloys also exhibited smaller grain size and spinodal decomposition plate than the Ixalloys. Additionally, because of the microstructure refinement and/or phase structure change, both the hardness and yield stress of Rxalloys were higher than the Ixalloys. The maximum increase rate presented when x = 0.6, and the minimum one presented when x = 0.4.

AB - The influence of cooling rate on microstructure and mechanical properties of the AlxSi0.2CrFeCoNiCu1−xhigh entropy alloys (HEAs) were investigated. The alloys were prepared by arc melting (the Ixalloys) and injection casting assisted by liquid nitrogen (the Rxalloys). Both the phase structure of Ixand Rxalloys evolved from FCC to FCC + BCC dual-phase, and finally to a BCC phase with an increase in the Al content, and the microstructure transformed from columnar dendrite to equiaxed grain correspondingly. The x range of the Rxalloys with dual-phase structure is smaller than that of the Ixalloys. The Rxalloys also exhibited smaller grain size and spinodal decomposition plate than the Ixalloys. Additionally, because of the microstructure refinement and/or phase structure change, both the hardness and yield stress of Rxalloys were higher than the Ixalloys. The maximum increase rate presented when x = 0.6, and the minimum one presented when x = 0.4.

KW - Cooling rate

KW - High-entropy alloys

KW - Mechanical properties

KW - Microstructure

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DO - 10.1016/j.jallcom.2016.09.213

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SN - 0925-8388

VL - 694

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JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Cooling rate-dependent microstructure and mechanical properties of Al_xSi_0.2CrFeCoNiCu_1−xhigh entropy alloys

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