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First-principles study of helium behaviors in oxide dispersion strengthened nickel alloys

Fan Jia / Yiren Wang / Yong Jiang

Y-Al-O oxides are characterized to be primary nanoprecipitates in oxide dispersion strengthened (ODS) Ni-based alloys for Very High Temperature Reactor (VHTR). We reported a first-principles study to assess the mechanical properties and helium behaviors in YAlO3(YAH) strengthened Ni-based ODS alloys from the nickel grain boundary and YAlO3 bulk to the Ni/ YAlO3 interface. The results suggest that YAH shows a elastic manner and well deformation compatibility with the matrix. The oxide strengthened system is expected to inhibit the formation of helium bubbles by capturing helium atoms dispersedly in YAlO3 bulk and Ni/ YAlO3 interface and thus hinder the He induced embrittlement.These findings provide basic understandings of the helium behaviors in a Al-cotnaining Ni-based ODS alloy.

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First-principles study of helium behaviors in oxide dispersion strengthened nickel alloys

Fan Jia / Yiren Wang / Yong Jiang

Y-Al-O oxides are characterized to be primary nanoprecipitates in oxide dispersion strengthened (ODS) Ni-based alloys for Very High Temperature Reactor (VHTR). We reported a first-principles study to assess the mechanical properties and helium behaviors in YAlO3(YAH) strengthened Ni-based ODS alloys from the nickel grain boundary and YAlO3 bulk to the Ni/ YAlO3 interface. The results suggest that YAH shows a elastic manner and well deformation compatibility with the matrix. The oxide strengthened system is expected to inhibit the formation of helium bubbles by capturing helium atoms dispersedly in YAlO3 bulk and Ni/ YAlO3 interface and thus hinder the He induced embrittlement.These findings provide basic understandings of the helium behaviors in a Al-cotnaining Ni-based ODS alloy.

First-principles study of helium behaviors in oxide dispersion strengthened nickel alloys

Fan Jia / Yiren Wang / Yong Jiang

Y-Al-O oxides are characterized to be primary nanoprecipitates in oxide dispersion strengthened (ODS) Ni-based alloys for Very High Temperature Reactor (VHTR). We reported a first-principles study to assess the mechanical properties and helium behaviors in YAlO3(YAH) strengthened Ni-based ODS alloys from the nickel grain boundary and YAlO3 bulk to the Ni/ YAlO3 interface. The results suggest that YAH shows a elastic manner and well deformation compatibility with the matrix. The oxide strengthened system is expected to inhibit the formation of helium bubbles by capturing helium atoms dispersedly in YAlO3 bulk and Ni/ YAlO3 interface and thus hinder the He induced embrittlement.These findings provide basic understandings of the helium behaviors in a Al-cotnaining Ni-based ODS alloy.

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Title:

First-principles study of helium behaviors in oxide dispersion strengthened nickel alloys

Contributors:

Fan Jia (author) / Yiren Wang (author) / Yong Jiang (author)

Published in:

Nuclear Materials and Energy, Vol 33, Iss , Pp 101313- (2022)

Publication date:

2022

ISSN:

DOI:

https://doi.org/10.1016/j.nme.2022.101313

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Keywords:

Oxide dispersion strengthened , Ni alloys , Helium , YAlO3 , First-principles , Grain boundary , Nuclear engineering. Atomic power , TK9001-9401

Metadata by DOAJ is licensed under CC BY-SA 1.0

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