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Title: Effects of temperature on helium bubble behaviour in Fe–9Cr alloy

Journal Article · · Journal of Nuclear Materials
 [1];  [2];  [3];  [4];  [4];  [3];  [4]
  1. Peking Univ., Beijing (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Hunan Univ., Changsha (China)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Peking Univ., Beijing (China)

In the present study, Fe–9Cr model alloys were irradiated by 275 keV He+ ions at 500 to 800 °C to a peak damage level and implanted helium content of 0.5 dpa and 0.75 at% He, respectively. Effects of temperature on He bubble behaviour were studied by transmission electron microscopy (TEM) to reveal the temperature effects. The bubble spatial distribution changes from homogenous at 500 and 600 °C to heterogeneous at 700 and 800 °C, due to preferential bubble precipitation on dislocations and grain boundaries at high temperature. Faceted bubbles with low energy faces along the {001} planes were present at all four temperatures and are attributed to surface energy minimization. Bubble precipitation on the GBs became more pronounced with increasing temperature. Meanwhile, the cavity swelling increased with increasing temperature, from 0.59% at 500 °C to 8.21% at 800 °C with a sharp increase above 700 °C. By analysing the temperature dependence of bubble size and density, a transition temperature between low and high temperature regimes was obtained in terms of different activation energies which are related to different bubble nucleation and formation mechanisms.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
SC0006661
OSTI ID:
1801707
Alternate ID(s):
OSTI ID: 1599644
Journal Information:
Journal of Nuclear Materials, Vol. 532; ISSN 0022-3115
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 18 works
Citation information provided by
Web of Science

References (42)

Energetics and formation kinetics of helium bubbles in metals journal January 1983
Microstructural evolution under helium implantation and self-ion irradiation in a ferritic steel and a model alloy journal August 1985
He and Cr effects on radiation damage formation in ion-irradiated pure iron and Fe–5.40wt.% Cr: A transmission electron microscopy study journal August 2013
Atomistic modeling of the interaction between self-interstitial dislocation loops and He in bcc Fe journal August 2007
Theory of helium transport and clustering in materials under irradiation journal July 1983
Modeling of helium effects in metals: High temperature embrittlement journal August 1985
The theory of blister formation journal January 1979
Dislocation loops and bubbles in oxide dispersion strengthened ferritic steel after helium implantation under stress journal January 2008
A new method for preparing 9Cr-ODS steel using elemental yttrium and Fe2O3 oxygen carrier journal January 2019
Interaction of helium–vacancy clusters with edge dislocations in α-Fe journal December 2007
Impact of He and Cr on defect accumulation in ion-irradiated ultrahigh-purity Fe(Cr) alloys journal October 2013
Release of helium from irradiation damage in Fe–9Cr ferritic alloy journal August 2004
Atomistics of helium bubble formation in a face-centered-cubic metal journal March 1976
Novel features of radiation-induced segregation and radiation-induced precipitation in austenitic stainless steels journal February 2011
He behavior in Ni and Ni-based equiatomic solid solution alloy journal July 2018
Helium accumulation in metals during irradiation – where do we stand? journal December 2003
Modelling the diffusion of self-interstitial atom clusters in Fe-Cr alloys journal January 2008
An analysis of the bubble formation behaviour under different experimental conditions journal January 1992
Bubble nucleation and growth in an Fe-12 at% Cr ferritic alloy under He+ implantation and Fe+ irradiation journal November 1986
The shape of bubbles in He-implanted Cu and Au journal August 2010
Dual-beam irradiation of α-iron: Heterogeneous bubble formation on dislocation loops journal November 2011
Fast three dimensional migration of He clusters in bcc Fe and Fe–Cr alloys journal May 2009
Microstructural evolution in Fe and Fe–Cr model alloys after He+ ion irradiations journal August 2004
Ferritic/martensitic steels for next-generation reactors journal September 2007
Characterization of dislocation loops and chromium-rich precipitates in ferritic iron–chromium alloys as means of void swelling suppression journal May 2007
On the use of SRIM for computing radiation damage exposure journal September 2013
Synergistic effect of helium and hydrogen for defect evolution under multi-ion irradiation of Fe–Cr ferritic alloys journal August 2004
The theory of void nucleation in metals journal October 1978
Diffusion of helium in nickel journal June 1982
Comparative study of He bubble formation in nanostructured reduced activation steel and its coarsen-grained counterpart journal March 2018
Swelling and microstructure of pure Fe and Fe–Cr alloys after neutron irradiation to ∼26dpa at 400°C journal September 2006
Interaction of helium atoms with edge dislocations in α-Fe journal June 2006
Comparison of swelling and irradiation creep behavior of fcc-austenitic and bcc-ferritic/martensitic alloys at high neutron exposure journal January 2000
The influence of helium on the bulk properties of fusion reactor structural materials journal August 1984
Helium bubble formation in nickel during hot implantation journal September 1994
Designing Radiation Resistance in Materials for Fusion Energy journal July 2014
Formation and migration of helium bubbles in Fe and Fe–9Cr ferritic alloy journal December 2002
The shape of an overpressurized bubble journal May 1981
Cluster dynamics study of damage accumulation in helium-implanted Fe–2.5at%Cr alloy journal February 2015
Vacancies and carbon impurities in α - iron: Electron irradiation journal January 1982
Helium effects on the creep and fatigue resistance of austenitic stainless steels at high temperatures journal January 1985
On the modeling of the high-temperature embrittlement of metals containing helium journal August 1983