High temperature deformation behavior of dual-phase Al0.6CoCrFeNi high-entropy alloys

Tangqing Cao; Lili Ma; Lu Wang; Jinlian Zhou; Yangwei Wang; Benpeng Wang; Yunfei Xue

doi:10.1016/j.jallcom.2020.155305

High temperature deformation behavior of dual-phase Al_0.6CoCrFeNi high-entropy alloys

Tangqing Cao, Lili Ma, Lu Wang, Jinlian Zhou, Yangwei Wang, Benpeng Wang, Yunfei Xue^*

^*Corresponding author for this work

School of Material Science and Engineering

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

27 Citations (Scopus)

Abstract

The deformation behavior of dual-phase (FCC + BCC) Al_0.6CoCrFeNi high-entropy alloy (HEA) was investigated in a temperature range from 900 °C to 1200 °C and a strain rate range from 10⁻³ to 1 s⁻¹. The BCC phase completely recrystallized when the deformation temperature exceeded 1100 °C, while the FCC phase did not even at 1200 °C. Continuing annealing at high temperature with long time (1200 °C for 20 h) can achieve an optimized microstructure, exhibiting that the island-shaped BCC phase uniformly distributed in the FCC phase with a fine equiaxed grain. Compared with the as-cast alloys, the annealed alloy shows an obvious increase in fracture strain with a relatively low decrease in yield stress, demonstrating that such a thermo-mechanical process is feasible for improving the mechanical property of dual-phase HEAs.

Original language	English
Article number	155305
Journal	Journal of Alloys and Compounds
Volume	836
DOIs	https://doi.org/10.1016/j.jallcom.2020.155305
Publication status	Published - 25 Sept 2020

Keywords

Dual-phase
High temperature deformation
High-entropy alloy
Mechanical property
Recrystallization behavior

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10.1016/j.jallcom.2020.155305

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title = "High temperature deformation behavior of dual-phase Al0.6CoCrFeNi high-entropy alloys",

abstract = "The deformation behavior of dual-phase (FCC + BCC) Al0.6CoCrFeNi high-entropy alloy (HEA) was investigated in a temperature range from 900 °C to 1200 °C and a strain rate range from 10−3 to 1 s−1. The BCC phase completely recrystallized when the deformation temperature exceeded 1100 °C, while the FCC phase did not even at 1200 °C. Continuing annealing at high temperature with long time (1200 °C for 20 h) can achieve an optimized microstructure, exhibiting that the island-shaped BCC phase uniformly distributed in the FCC phase with a fine equiaxed grain. Compared with the as-cast alloys, the annealed alloy shows an obvious increase in fracture strain with a relatively low decrease in yield stress, demonstrating that such a thermo-mechanical process is feasible for improving the mechanical property of dual-phase HEAs.",

keywords = "Dual-phase, High temperature deformation, High-entropy alloy, Mechanical property, Recrystallization behavior",

author = "Tangqing Cao and Lili Ma and Lu Wang and Jinlian Zhou and Yangwei Wang and Benpeng Wang and Yunfei Xue",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = sep,

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doi = "10.1016/j.jallcom.2020.155305",

language = "English",

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journal = "Journal of Alloys and Compounds",

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T1 - High temperature deformation behavior of dual-phase Al0.6CoCrFeNi high-entropy alloys

AU - Cao, Tangqing

AU - Ma, Lili

AU - Wang, Lu

AU - Zhou, Jinlian

AU - Wang, Yangwei

AU - Wang, Benpeng

AU - Xue, Yunfei

PY - 2020/9/25

Y1 - 2020/9/25

N2 - The deformation behavior of dual-phase (FCC + BCC) Al0.6CoCrFeNi high-entropy alloy (HEA) was investigated in a temperature range from 900 °C to 1200 °C and a strain rate range from 10−3 to 1 s−1. The BCC phase completely recrystallized when the deformation temperature exceeded 1100 °C, while the FCC phase did not even at 1200 °C. Continuing annealing at high temperature with long time (1200 °C for 20 h) can achieve an optimized microstructure, exhibiting that the island-shaped BCC phase uniformly distributed in the FCC phase with a fine equiaxed grain. Compared with the as-cast alloys, the annealed alloy shows an obvious increase in fracture strain with a relatively low decrease in yield stress, demonstrating that such a thermo-mechanical process is feasible for improving the mechanical property of dual-phase HEAs.

AB - The deformation behavior of dual-phase (FCC + BCC) Al0.6CoCrFeNi high-entropy alloy (HEA) was investigated in a temperature range from 900 °C to 1200 °C and a strain rate range from 10−3 to 1 s−1. The BCC phase completely recrystallized when the deformation temperature exceeded 1100 °C, while the FCC phase did not even at 1200 °C. Continuing annealing at high temperature with long time (1200 °C for 20 h) can achieve an optimized microstructure, exhibiting that the island-shaped BCC phase uniformly distributed in the FCC phase with a fine equiaxed grain. Compared with the as-cast alloys, the annealed alloy shows an obvious increase in fracture strain with a relatively low decrease in yield stress, demonstrating that such a thermo-mechanical process is feasible for improving the mechanical property of dual-phase HEAs.

KW - Dual-phase

KW - High temperature deformation

KW - High-entropy alloy

KW - Mechanical property

KW - Recrystallization behavior

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U2 - 10.1016/j.jallcom.2020.155305

DO - 10.1016/j.jallcom.2020.155305

M3 - Article

AN - SCOPUS:85084255413

SN - 0925-8388

VL - 836

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

M1 - 155305

ER -

High temperature deformation behavior of dual-phase Al_0.6CoCrFeNi high-entropy alloys

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Keywords

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