Irradiation effects of medium-entropy alloy NiCoCr with and without pre-indentation

Chenyang Lu; Tai Ni Yang; Ke Jin; Gihan Velisa; Pengyuan Xiu; Qing Peng; Fei Gao; Yanwen Zhang; Hongbin Bei; William J. Weber; Lumin Wang

doi:10.1016/j.jnucmat.2019.06.020

Irradiation effects of medium-entropy alloy NiCoCr with and without pre-indentation

Chenyang Lu^*, Tai Ni Yang, Ke Jin, Gihan Velisa, Pengyuan Xiu, Qing Peng, Fei Gao, Yanwen Zhang, Hongbin Bei, William J. Weber, Lumin Wang

^*Corresponding author for this work

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

39 Citations (Scopus)

Abstract

Medium entropy alloy NiCoCr draws great attention due to its excellent strength-ductility trade-off mechanical behavior. Its irradiation behavior at elevated temperatures has been investigated using ion beam irradiation in a temperature range of 420–580°Cand transmission electron microscopy. Irradiation induced stacking fault tetrahedra were only observed at 420 °C. With increasing irradiation temperature, all stacking fault tetrahedra vanished, while the size of voids and dislocation loops increased significantly. Nanoindentation-induced structural complexities, including dislocations, stacking faults and twins helped to reduce void swelling. However, at the elevated temperatures, NiCoCr is still much more susceptible to void swelling compared to high entropy alloys such as NiCoFeCrMn and NiCoFeCrPd.

Original language	English
Pages (from-to)	60-66
Number of pages	7
Journal	Journal of Nuclear Materials
Volume	524
DOIs	https://doi.org/10.1016/j.jnucmat.2019.06.020
Publication status	Published - Oct 2019
Externally published	Yes

Keywords

Ion beam irradiation
Medium entropy alloy
Structural complexity
Void swelling

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10.1016/j.jnucmat.2019.06.020

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title = "Irradiation effects of medium-entropy alloy NiCoCr with and without pre-indentation",

abstract = "Medium entropy alloy NiCoCr draws great attention due to its excellent strength-ductility trade-off mechanical behavior. Its irradiation behavior at elevated temperatures has been investigated using ion beam irradiation in a temperature range of 420–580°Cand transmission electron microscopy. Irradiation induced stacking fault tetrahedra were only observed at 420 °C. With increasing irradiation temperature, all stacking fault tetrahedra vanished, while the size of voids and dislocation loops increased significantly. Nanoindentation-induced structural complexities, including dislocations, stacking faults and twins helped to reduce void swelling. However, at the elevated temperatures, NiCoCr is still much more susceptible to void swelling compared to high entropy alloys such as NiCoFeCrMn and NiCoFeCrPd.",

keywords = "Ion beam irradiation, Medium entropy alloy, Structural complexity, Void swelling",

author = "Chenyang Lu and Yang, {Tai Ni} and Ke Jin and Gihan Velisa and Pengyuan Xiu and Qing Peng and Fei Gao and Yanwen Zhang and Hongbin Bei and Weber, {William J.} and Lumin Wang",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = oct,

doi = "10.1016/j.jnucmat.2019.06.020",

language = "English",

volume = "524",

pages = "60--66",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

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TY - JOUR

T1 - Irradiation effects of medium-entropy alloy NiCoCr with and without pre-indentation

AU - Lu, Chenyang

AU - Yang, Tai Ni

AU - Jin, Ke

AU - Velisa, Gihan

AU - Xiu, Pengyuan

AU - Peng, Qing

AU - Gao, Fei

AU - Zhang, Yanwen

AU - Bei, Hongbin

AU - Weber, William J.

AU - Wang, Lumin

PY - 2019/10

Y1 - 2019/10

N2 - Medium entropy alloy NiCoCr draws great attention due to its excellent strength-ductility trade-off mechanical behavior. Its irradiation behavior at elevated temperatures has been investigated using ion beam irradiation in a temperature range of 420–580°Cand transmission electron microscopy. Irradiation induced stacking fault tetrahedra were only observed at 420 °C. With increasing irradiation temperature, all stacking fault tetrahedra vanished, while the size of voids and dislocation loops increased significantly. Nanoindentation-induced structural complexities, including dislocations, stacking faults and twins helped to reduce void swelling. However, at the elevated temperatures, NiCoCr is still much more susceptible to void swelling compared to high entropy alloys such as NiCoFeCrMn and NiCoFeCrPd.

AB - Medium entropy alloy NiCoCr draws great attention due to its excellent strength-ductility trade-off mechanical behavior. Its irradiation behavior at elevated temperatures has been investigated using ion beam irradiation in a temperature range of 420–580°Cand transmission electron microscopy. Irradiation induced stacking fault tetrahedra were only observed at 420 °C. With increasing irradiation temperature, all stacking fault tetrahedra vanished, while the size of voids and dislocation loops increased significantly. Nanoindentation-induced structural complexities, including dislocations, stacking faults and twins helped to reduce void swelling. However, at the elevated temperatures, NiCoCr is still much more susceptible to void swelling compared to high entropy alloys such as NiCoFeCrMn and NiCoFeCrPd.

KW - Ion beam irradiation

KW - Medium entropy alloy

KW - Structural complexity

KW - Void swelling

UR - http://www.scopus.com/inward/record.url?scp=85068192180&partnerID=8YFLogxK

U2 - 10.1016/j.jnucmat.2019.06.020

DO - 10.1016/j.jnucmat.2019.06.020

M3 - Article

AN - SCOPUS:85068192180

SN - 0022-3115

VL - 524

SP - 60

EP - 66

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

ER -

Irradiation effects of medium-entropy alloy NiCoCr with and without pre-indentation

Abstract

Keywords

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