Effect of He on the irradiation resistance of equiatomic CoCrFeMnNi high-entropy alloy

Huang, Siling; Guan, Huaqing; Zhong, Zhihong; Miyamoto, M.; Xu, Qiu

doi:10.1016/j.jnucmat.2022.153525

Cited by 16 publications

(2 citation statements)

References 28 publications

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“…When irradiated with helium ions, the size of helium bubbles increases with temperature in the HEA based on Ni–Co–Fe–Cr, and the density number of these bubbles decreases [ 29 , 30 , 31 ]. In addition, it was found that the density of helium bubbles in CoCrFeMnNi increased with the fluence of helium ions during irradiation, but decreased with increasing temperature, and reached 5 × 10 23 m −3 at the highest fluence of 2 × 10 16 cm −2 [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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High-entropy alloys (HEAs) have prospects for use as nuclear structural materials. Helium irradiation can form bubbles deteriorating the structure of structural materials. The structure and composition of NiCoFeCr and NiCoFeCrMn HEAs formed by arc melting and irradiated with low-energy 40 keV He2+ ions and a fluence of 2 × 1017 cm−2 have been studied. Helium irradiation of two HEAs does not change the elemental and phase composition, and does not erode the surface. Irradiation of NiCoFeCr and NiCoFeCrMn with a fluence of 5 × 1016 cm−2 forms compressive stresses (−90 … −160 MPa) and the stresses grow over −650 MPa as fluence increases to 2 × 1017 cm−2. Compressive microstresses grow up to 2.7 GPa at a fluence of 5 × 1016 cm−2, and up to 6.8 GPa at 2 × 1017 cm−2. The dislocation density rises by a factor of 5–12 for a fluence of 5 × 1016 cm−2, and by 30–60 for a fluence of 2 × 1017 cm−2. Stresses and dislocation density in the HEAs change the most in the region of the maximal damage dose. NiCoFeCrMn has higher macro- and microstresses, dislocation density, and a larger increase in their values, with an increasing helium ion fluence compared to NiCoFeCr. NiCoFeCrMn a showed higher radiation resistance compared to NiCoFeCr.

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Section: Introductionmentioning

confidence: 99%

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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“…The effect of helium interaction on the irradiation resistance of Fe-Mn-Ni-Co-Cr HEA was analyzed. Researchers found that the density of helium bubbles formed during irradiation directly impacted the irradiation response of the material, with lower density at higher irradiation temperatures [36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Frenkel pairs on the tensile and shock compression strength of multi-elemental alloys

Singh,

Parashar

2023

Phys. Scr.

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In this article, molecular dynamics simulations were performed to study the effect of irradiation damage on the tensile and shock compression behaviour of multi-elemental alloys (medium and high entropy alloys). These simulations were divided into three broad stages; in the first section, a displacement cascade was generated in the simulation box using primary knock-on atoms (PKA) with kinetic energy in the range of 0.25 to 2 keV. In the second stage, the same defected crystal was subjected to tensile loading to study the deformation mechanism of multi-elemental alloys containing these irradiation-induced defects. In the last stage, tensile loading was replaced by ultrashort shock pulse loading. Irradiation damage significantly alters the tensile strength of Fe-Ni-Co-Cr-Cu and Fe-Ni-Cr alloys. The primary deformation governing mechanism is the spatial distribution of stacking faults and partial dislocations during deformation. Lattice distortion reduces the tensile strength of multi-elemental alloys compared to A-atom configurations. In shock loading, the shock resistance capability of irradiated Fe-Ni-Co-Cr-Cu was better than Fe-Ni-Cr alloy. Lattice distortion in random multi-elemental alloys helps in mitigating the shock propagation.

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Welding Dissimilar Alloys of CoCrFeMnNi High-Entropy Alloy and 304 Stainless Steel Using Gas Tungsten Arc Welding

Zhang

Cheng

et al. 2023

J. of Materi Eng and Perform

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Effect of He on the irradiation resistance of equiatomic CoCrFeMnNi high-entropy alloy

Cited by 16 publications

References 28 publications

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Effect of Frenkel pairs on the tensile and shock compression strength of multi-elemental alloys

Welding Dissimilar Alloys of CoCrFeMnNi High-Entropy Alloy and 304 Stainless Steel Using Gas Tungsten Arc Welding

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