Healing of nanocracks by collision cascades in nickel

Chen, Peng; Chesetti, Advika; Demkowicz, Michael J.

doi:10.1016/j.jnucmat.2021.153124

Cited by 6 publications

(1 citation statement)

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“…Three compositions of Inconel, namely, Incoloy 800H (Ni 32 Cr 21 Fe 47 ), Inconel 718 (Ni 55 Cr 21 Fe 24 ), and Inconel 625 (Ni 72 Cr 23 Fe 5 ), for an 80 × 40 × 40 face-centered cubic (FCC) lattice structure of Cu with 512,000 atoms were considered, with both the Inconel and copper layers having a thickness of 144.32 Å each. This system size ensures that the collision cascades initiated by 10 keV Primary Knock-on Atoms (PKAs) have no interaction with the periodic images during the modeling of the collision cascades [37]. For constructing the atomistic model of the MMLC, the left half of the pre-existing copper slab was replaced with an equivalent Inconel segment, resulting in a structure composed of 256,000 Inconel atoms.…”

Section: Methodsmentioning

confidence: 99%

Radiation-Induced Defect Formation Kinetics in Inconel–Cu Multimetallic Layered Composites

Ramesh,

Momeni

2024

J. Compos. Sci.

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This study investigates the stability of Inconel–Cu Multimetallic Layered Composites (MMLCs) in nuclear reactor applications using Molecular Dynamics simulations. The focus is on understanding the underlying mechanisms governing the properties of MMLCs for advanced nuclear reactors, specifically, the mechanochemistry of the interface between Inconel and copper alloys. The selection of Inconel–Cu MMLCs is primarily due to copper’s superior thermal conductivity, enhancing heat management within reactors by preventing hotspots and ensuring uniform temperature distribution. This research examines Incoloy 800H and two Inconel variants (718 and 625), assessing their stability at 1000 K after exposure to 10 keV collision cascades up to 0.12 dpa. Notable findings include defect clustering on the {1 2 0} family of planes of Inconel and Cu, with Stacking Faults and Lomer–Cottrell locks on the Inconel side.

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Section: Methodsmentioning

confidence: 99%