Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating
The phase transformation kinetics of a face-centered-cubic (FCC) Al<sub>0.25</sub>CoCrFeNi high-entropy alloy during isochronal heating is investigated by thermal dilation experiment. The phase transformed volume fraction is determined from the thermal expansion curve, and results show t...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2018-12-01
|
Series: | Metals |
Subjects: | |
Online Access: | https://www.mdpi.com/2075-4701/8/12/1015 |
_version_ | 1818021864595783680 |
---|---|
author | Jun Wang Chen Wei Haoxue Yang Tong Guo Tingting Xu Jinshan Li |
author_facet | Jun Wang Chen Wei Haoxue Yang Tong Guo Tingting Xu Jinshan Li |
author_sort | Jun Wang |
collection | DOAJ |
description | The phase transformation kinetics of a face-centered-cubic (FCC) Al<sub>0.25</sub>CoCrFeNi high-entropy alloy during isochronal heating is investigated by thermal dilation experiment. The phase transformed volume fraction is determined from the thermal expansion curve, and results show that the phase transition is controlled by diffusion controlled nucleation-growth mechanism. The kinetic parameters, activation energy and kinetic exponent are determined based on Kissinger⁻Akahira⁻Sunose (KAS) and Johnson⁻Mehl⁻Avrami (JMA) method, respectively. The activation energy and kinetic exponent determined are almost constant, indicating a stable and slow speed of phase transition in the FCC Al<sub>0.25</sub>CoCrFeNi high-entropy alloy. During the main transformation process, the kinetic exponent shows that the phase transition is diffusion controlled process without nucleation during the transformation. |
first_indexed | 2024-04-14T08:24:53Z |
format | Article |
id | doaj.art-13773c289b5d466086545954b8f0ef95 |
institution | Directory Open Access Journal |
issn | 2075-4701 |
language | English |
last_indexed | 2024-04-14T08:24:53Z |
publishDate | 2018-12-01 |
publisher | MDPI AG |
record_format | Article |
series | Metals |
spelling | doaj.art-13773c289b5d466086545954b8f0ef952022-12-22T02:04:06ZengMDPI AGMetals2075-47012018-12-01812101510.3390/met8121015met8121015Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal HeatingJun Wang0Chen Wei1Haoxue Yang2Tong Guo3Tingting Xu4Jinshan Li5State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, ChinaThe phase transformation kinetics of a face-centered-cubic (FCC) Al<sub>0.25</sub>CoCrFeNi high-entropy alloy during isochronal heating is investigated by thermal dilation experiment. The phase transformed volume fraction is determined from the thermal expansion curve, and results show that the phase transition is controlled by diffusion controlled nucleation-growth mechanism. The kinetic parameters, activation energy and kinetic exponent are determined based on Kissinger⁻Akahira⁻Sunose (KAS) and Johnson⁻Mehl⁻Avrami (JMA) method, respectively. The activation energy and kinetic exponent determined are almost constant, indicating a stable and slow speed of phase transition in the FCC Al<sub>0.25</sub>CoCrFeNi high-entropy alloy. During the main transformation process, the kinetic exponent shows that the phase transition is diffusion controlled process without nucleation during the transformation.https://www.mdpi.com/2075-4701/8/12/1015high-entropy alloyphase transformationkineticsisochronal heating |
spellingShingle | Jun Wang Chen Wei Haoxue Yang Tong Guo Tingting Xu Jinshan Li Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating Metals high-entropy alloy phase transformation kinetics isochronal heating |
title | Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating |
title_full | Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating |
title_fullStr | Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating |
title_full_unstemmed | Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating |
title_short | Phase Transformation Kinetics of a FCC Al<sub>0.25</sub>CoCrFeNi High-Entropy Alloy during Isochronal Heating |
title_sort | phase transformation kinetics of a fcc al sub 0 25 sub cocrfeni high entropy alloy during isochronal heating |
topic | high-entropy alloy phase transformation kinetics isochronal heating |
url | https://www.mdpi.com/2075-4701/8/12/1015 |
work_keys_str_mv | AT junwang phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating AT chenwei phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating AT haoxueyang phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating AT tongguo phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating AT tingtingxu phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating AT jinshanli phasetransformationkineticsofafccalsub025subcocrfenihighentropyalloyduringisochronalheating |