He bubbles inhibition and abnormal hardening in GH3535 alloy by niobium element addition

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Author(s)

  • Chengpeng Liu
  • Xiang-Xi Ye
  • Zhenbo Zhu
  • Guanhong Lei
  • Lin Ge
  • Xiaona Zhang
  • Bin Leng
  • Hefei Huang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number154841
Journal / PublicationJournal of Nuclear Materials
Volume589
Online published30 Nov 2023
Publication statusPublished - Feb 2024

Link(s)

DOI

DOI
Check@CityULib
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-85178112254&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(5b8a1acc-f095-47a5-b3da-7e4d394d187c).html

Abstract

GH3535 and 2 wt.% Nb-modified GH3535 (Nb-GH3535) alloys were irradiated with 1.2 MeV He ion at fluences of 1 × 1016, 3 × 1016 and 1 × 1017 ions/cm2 at 750 °C. Microstructural changes, including the formation of He bubbles and superlattice phases, as well as the irradiation-induced hardening, were investigated by TEM and nanoindentation. Notably, Nb-GH3535 exhibited a smaller size and lower number density of He bubbles, especially at higher fluences, indicating the inhibitory effect of Nb on bubble evolution. First-principles calculations revealed that the presence of Nb inhibits the combination of He atoms and vacancies, reducing their diffusion rate and consequently impeding the nucleation and growth of He bubbles. Furthermore, the addition of Nb facilitates the irradiation-induced precipitation of the superlattice phase, leading to a higher degree of total hardening in Nb-GH3535 alloy. © 2023 Elsevier B.V.

Research Area(s)

  • He bubble, He ion irradiation, Nb element, Nickel-based alloy, Superlattice phase

Fingerprint

Publication fingerprints text

100
Alloy Engineering
100
Elements Engineering
100
Bubble Engineering
100
Hardening Engineering
100
Inhibition Engineering
100
Element Addition Keyphrases
100
He Bubbles Keyphrases
100
Niobium Element Keyphrases
100
GH3535 Alloy Keyphrases
100
Niobium Material Science
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Citation Format(s)

[ RIS ] [ BibTeX ]
He bubbles inhibition and abnormal hardening in GH3535 alloy by niobium element addition. / Liu, Chengpeng; Ye, Xiang-Xi; Zhu, Zhenbo et al.
In: Journal of Nuclear Materials, Vol. 589, 154841, 02.2024.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review