Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys

Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys

The CoCrNi and precipitate-hardened (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> medium entropy alloys (MEAs) have attracted much attention, due to their exceptional mechanical properties, whereas the hot deformation characteristics have not been revealed. In...

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Main Authors: Hai-long Yi, Daixiu Wei, Yingchen Wang, Liqiang Wang, Ming-yang Fang, Kang Yang, Hidemi Kato
Format: Article
Language:English
Published: MDPI AG 2020-10-01
Series:Metals
Subjects:
medium entropy alloy
hot deformation
recrystallization
constitutive equation
microstructure
Online Access:https://www.mdpi.com/2075-4701/10/10/1341
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spelling doaj-54e04f452d08445b866bfb343f796ab52020-11-25T03:50:19ZengMDPI AGMetals2075-47012020-10-01101341134110.3390/met10101341Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy AlloysHai-long Yi0Daixiu Wei1Yingchen Wang2Liqiang Wang3Ming-yang Fang4Kang Yang5Hidemi Kato6State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai, Miyagi 980-8577, JapanState Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaState Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai, Miyagi 980-8577, JapanThe CoCrNi and precipitate-hardened (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> medium entropy alloys (MEAs) have attracted much attention, due to their exceptional mechanical properties, whereas the hot deformation characteristics have not been revealed. In the present study, we investigated the dynamic recrystallization behavior and microstructure evolutions of the two MEAs hot-compressed at single-phase temperatures. The constitutive equation was obtained, and microstructures were observed. Discontinuous dynamic recrystallization acted as a key mechanism of grain refinement at a relatively higher temperature and lower strain rate, which leads to the formation of a homogeneous grain structure. The addition of Ti and Al promoted dynamic recrystallization due to the solid solution hardening effect. The results provide valuable guidelines for microstructure refinement via thermomechanical processing.https://www.mdpi.com/2075-4701/10/10/1341medium entropy alloyhot deformationrecrystallizationconstitutive equationmicrostructure
collection DOAJ
language English
format Article
sources DOAJ
author Hai-long Yi
Daixiu Wei
Yingchen Wang
Liqiang Wang
Ming-yang Fang
Kang Yang
Hidemi Kato
spellingShingle Hai-long Yi
Daixiu Wei
Yingchen Wang
Liqiang Wang
Ming-yang Fang
Kang Yang
Hidemi Kato
Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
Metals
medium entropy alloy
hot deformation
recrystallization
constitutive equation
microstructure
author_facet Hai-long Yi
Daixiu Wei
Yingchen Wang
Liqiang Wang
Ming-yang Fang
Kang Yang
Hidemi Kato
author_sort Hai-long Yi
title Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
title_short Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
title_full Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
title_fullStr Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
title_full_unstemmed Hot Deformation and Dynamic Recrystallization Behavior of CoCrNi and (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> Medium Entropy Alloys
title_sort hot deformation and dynamic recrystallization behavior of cocrni and (cocrni)<sub>94</sub>ti<sub>3</sub>al<sub>3</sub> medium entropy alloys
publisher MDPI AG
series Metals
issn 2075-4701
publishDate 2020-10-01
description The CoCrNi and precipitate-hardened (CoCrNi)<sub>94</sub>Ti<sub>3</sub>Al<sub>3</sub> medium entropy alloys (MEAs) have attracted much attention, due to their exceptional mechanical properties, whereas the hot deformation characteristics have not been revealed. In the present study, we investigated the dynamic recrystallization behavior and microstructure evolutions of the two MEAs hot-compressed at single-phase temperatures. The constitutive equation was obtained, and microstructures were observed. Discontinuous dynamic recrystallization acted as a key mechanism of grain refinement at a relatively higher temperature and lower strain rate, which leads to the formation of a homogeneous grain structure. The addition of Ti and Al promoted dynamic recrystallization due to the solid solution hardening effect. The results provide valuable guidelines for microstructure refinement via thermomechanical processing.
topic medium entropy alloy
hot deformation
recrystallization
constitutive equation
microstructure
url https://www.mdpi.com/2075-4701/10/10/1341
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AT daixiuwei hotdeformationanddynamicrecrystallizationbehaviorofcocrniandcocrnisub94subtisub3subalsub3submediumentropyalloys
AT yingchenwang hotdeformationanddynamicrecrystallizationbehaviorofcocrniandcocrnisub94subtisub3subalsub3submediumentropyalloys
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