Effective Surface Nano-Crystallization of Ni2FeCoMo0.5V0.2 Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)

The surface nano-crystallization of Ni2FeCoMo0.5V0.2 medium-entropy alloy was realized by rotationally accelerated shot peening (RASP). The average grain size at the surface layer is ~37 nm, and the nano-grained layer is as thin as...

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Main Authors:	Ningning Liang, Xiang Wang, Yang Cao, Yusheng Li, Yuntian Zhu, Yonghao Zhao
Format:	Article
Language:	English
Published:	MDPI AG 2020-09-01
Series:	Entropy
Subjects:	medium entropy alloy deformation twinning dislocation slip surface nano-crystallization shot peening
Online Access:	https://www.mdpi.com/1099-4300/22/10/1074

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spelling	doaj-caa30f77242845e6a39f6c458225f33d2020-11-25T03:41:47ZengMDPI AGEntropy1099-43002020-09-01221074107410.3390/e22101074Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)Ningning Liang0Xiang Wang1Yang Cao2Yusheng Li3Yuntian Zhu4Yonghao Zhao5School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaSchool of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, ChinaThe surface nano-crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> medium-entropy alloy was realized by rotationally accelerated shot peening (RASP). The average grain size at the surface layer is ~37 nm, and the nano-grained layer is as thin as ~20 μm. Transmission electron microscopy analysis revealed that deformation twinning and dislocation activities are responsible for the effective grain refinement of the high-entropy alloy. In order to reveal the effectiveness of surface nano-crystallization on the Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> medium-entropy alloy, a common model material, Ni, is used as a reference. Under the same shot peening condition, the surface layer of Ni could only be refined to an average grain size of ~234 nm. An ultrafine grained surface layer is less effective in absorbing strain energy than a nano-grain layer. Thus, grain refinement could be realized at a depth up to 70 μm in the Ni sample.https://www.mdpi.com/1099-4300/22/10/1074medium entropy alloydeformation twinningdislocation slipsurface nano-crystallizationshot peening
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ningning Liang Xiang Wang Yang Cao Yusheng Li Yuntian Zhu Yonghao Zhao
spellingShingle	Ningning Liang Xiang Wang Yang Cao Yusheng Li Yuntian Zhu Yonghao Zhao Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP) Entropy medium entropy alloy deformation twinning dislocation slip surface nano-crystallization shot peening
author_facet	Ningning Liang Xiang Wang Yang Cao Yusheng Li Yuntian Zhu Yonghao Zhao
author_sort	Ningning Liang
title	Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)
title_short	Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)
title_full	Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)
title_fullStr	Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)
title_full_unstemmed	Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)
title_sort	effective surface nano-crystallization of ni<sub>2</sub>fecomo<sub>0.5</sub>v<sub>0.2</sub> medium entropy alloy by rotationally accelerated shot peening (rasp)
publisher	MDPI AG
series	Entropy
issn	1099-4300
publishDate	2020-09-01
description	The surface nano-crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> medium-entropy alloy was realized by rotationally accelerated shot peening (RASP). The average grain size at the surface layer is ~37 nm, and the nano-grained layer is as thin as ~20 μm. Transmission electron microscopy analysis revealed that deformation twinning and dislocation activities are responsible for the effective grain refinement of the high-entropy alloy. In order to reveal the effectiveness of surface nano-crystallization on the Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> medium-entropy alloy, a common model material, Ni, is used as a reference. Under the same shot peening condition, the surface layer of Ni could only be refined to an average grain size of ~234 nm. An ultrafine grained surface layer is less effective in absorbing strain energy than a nano-grain layer. Thus, grain refinement could be realized at a depth up to 70 μm in the Ni sample.
topic	medium entropy alloy deformation twinning dislocation slip surface nano-crystallization shot peening
url	https://www.mdpi.com/1099-4300/22/10/1074
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Effective Surface Nano-Crystallization of Ni<sub>2</sub>FeCoMo<sub>0.5</sub>V<sub>0.2</sub> Medium Entropy Alloy by Rotationally Accelerated Shot Peening (RASP)

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