Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High-Entropy Alloy

Xue Yin; Yan Kun Dou; Xin Fu He; Ke Jin; Cheng Long Wang; Ya Guang Dong; Cun Yong Wang; Yun Fei Xue; Wen Yang

doi:10.1007/s40195-022-01494-4

Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High-Entropy Alloy

Xue Yin, Yan Kun Dou^*, Xin Fu He^*, Ke Jin, Cheng Long Wang, Ya Guang Dong, Cun Yong Wang, Yun Fei Xue, Wen Yang

^*Corresponding author for this work

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

6 Citations (Scopus)

Abstract

In the present study, the effects of Nb addition on Charpy impact properties of TiVTa refractory high-entropy alloy with high strength-ductility trade-off were systematically studied by using the instrumented Charpy impact testing machine. The experimental results showed that the impact toughness was remarkably improved by Nb addition in TiVTa to form TiVTaNb alloy. The crack initiation energy and propagation energy of TiVTaNb were 67.3% and 24.9% higher than that of TiVTa, indicating that Nb addition simultaneously reinforced the resistance to crack initiation and propagation. The impact fracture of TiVTaNb exhibited larger bending degree of shear lips, deeper dimples and more secondary cracks which effectively dissipated more impact energy. The deformation mechanism of TiVTa alloy was dominated by dislocation activities. While in TiVTaNb, the deformation mechanism was synergized by dislocation activities and deformation twinning, which were the main contributors for the improved impact properties and the stronger crack resistance of TiVTaNb alloy under impact loading.

Original language	English
Pages (from-to)	405-416
Number of pages	12
Journal	Acta Metallurgica Sinica (English Letters)
Volume	36
Issue number	3
DOIs	https://doi.org/10.1007/s40195-022-01494-4
Publication status	Published - Mar 2023

Keywords

Crack resistance
Deformation mechanism
Impact property
Nb addition
Refractory high-entropy alloys

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10.1007/s40195-022-01494-4

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@article{aa8e8d5780574afaafa72b2c042bedea,

title = "Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High-Entropy Alloy",

abstract = "In the present study, the effects of Nb addition on Charpy impact properties of TiVTa refractory high-entropy alloy with high strength-ductility trade-off were systematically studied by using the instrumented Charpy impact testing machine. The experimental results showed that the impact toughness was remarkably improved by Nb addition in TiVTa to form TiVTaNb alloy. The crack initiation energy and propagation energy of TiVTaNb were 67.3% and 24.9% higher than that of TiVTa, indicating that Nb addition simultaneously reinforced the resistance to crack initiation and propagation. The impact fracture of TiVTaNb exhibited larger bending degree of shear lips, deeper dimples and more secondary cracks which effectively dissipated more impact energy. The deformation mechanism of TiVTa alloy was dominated by dislocation activities. While in TiVTaNb, the deformation mechanism was synergized by dislocation activities and deformation twinning, which were the main contributors for the improved impact properties and the stronger crack resistance of TiVTaNb alloy under impact loading.",

keywords = "Crack resistance, Deformation mechanism, Impact property, Nb addition, Refractory high-entropy alloys",

author = "Xue Yin and Dou, {Yan Kun} and He, {Xin Fu} and Ke Jin and Wang, {Cheng Long} and Dong, {Ya Guang} and Wang, {Cun Yong} and Xue, {Yun Fei} and Wen Yang",

note = "Publisher Copyright: {\textcopyright} 2022, The Chinese Society for Metals (CSM) and Springer-Verlag GmbH Germany, part of Springer Nature.",

year = "2023",

month = mar,

doi = "10.1007/s40195-022-01494-4",

language = "English",

volume = "36",

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TY - JOUR

T1 - Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High-Entropy Alloy

AU - Yin, Xue

AU - Dou, Yan Kun

AU - He, Xin Fu

AU - Jin, Ke

AU - Wang, Cheng Long

AU - Dong, Ya Guang

AU - Wang, Cun Yong

AU - Xue, Yun Fei

AU - Yang, Wen

PY - 2023/3

Y1 - 2023/3

N2 - In the present study, the effects of Nb addition on Charpy impact properties of TiVTa refractory high-entropy alloy with high strength-ductility trade-off were systematically studied by using the instrumented Charpy impact testing machine. The experimental results showed that the impact toughness was remarkably improved by Nb addition in TiVTa to form TiVTaNb alloy. The crack initiation energy and propagation energy of TiVTaNb were 67.3% and 24.9% higher than that of TiVTa, indicating that Nb addition simultaneously reinforced the resistance to crack initiation and propagation. The impact fracture of TiVTaNb exhibited larger bending degree of shear lips, deeper dimples and more secondary cracks which effectively dissipated more impact energy. The deformation mechanism of TiVTa alloy was dominated by dislocation activities. While in TiVTaNb, the deformation mechanism was synergized by dislocation activities and deformation twinning, which were the main contributors for the improved impact properties and the stronger crack resistance of TiVTaNb alloy under impact loading.

AB - In the present study, the effects of Nb addition on Charpy impact properties of TiVTa refractory high-entropy alloy with high strength-ductility trade-off were systematically studied by using the instrumented Charpy impact testing machine. The experimental results showed that the impact toughness was remarkably improved by Nb addition in TiVTa to form TiVTaNb alloy. The crack initiation energy and propagation energy of TiVTaNb were 67.3% and 24.9% higher than that of TiVTa, indicating that Nb addition simultaneously reinforced the resistance to crack initiation and propagation. The impact fracture of TiVTaNb exhibited larger bending degree of shear lips, deeper dimples and more secondary cracks which effectively dissipated more impact energy. The deformation mechanism of TiVTa alloy was dominated by dislocation activities. While in TiVTaNb, the deformation mechanism was synergized by dislocation activities and deformation twinning, which were the main contributors for the improved impact properties and the stronger crack resistance of TiVTaNb alloy under impact loading.

KW - Crack resistance

KW - Deformation mechanism

KW - Impact property

KW - Nb addition

KW - Refractory high-entropy alloys

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U2 - 10.1007/s40195-022-01494-4

DO - 10.1007/s40195-022-01494-4

M3 - Article

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SN - 1006-7191

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JO - Acta Metallurgica Sinica (English Letters)

JF - Acta Metallurgica Sinica (English Letters)

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ER -

Effects of Nb Addition on Charpy Impact Properties of TiVTa Refractory High-Entropy Alloy

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