The influence of carbon on cavity evolution in ion-irradiated ferritic-martensitic steels

Monterrosa, Anthony M.; Woodley, D.; Jiao, Zhijie; Was, Gary S.

doi:10.1016/j.jnucmat.2018.05.012

Cited by 22 publications

(10 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In low He appm/dpa ratios (4-15 He appm/dpa), the transition is expected to occur faster than for higher ratios (50 He appm/dpa). This was supported by the results by Manterrosa et al in F/M steels [26] [40] . What changes in the microstructure is the required critical radius for the bias growth model to play a role.…”

Section: On the Bubble Size Distribution Shape (Unimodal Versus Bimodsupporting

confidence: 82%

“…Based on our observations, two observations can be made: (i) as the dose and helium concentration increases the density of cavities increases; and (ii) as the He appm/dpa increases the bubble size gets smaller; indeed, at the low He appm/dpa ratio, bubbles did not become visible until doses greater than 26 dpa with 57.2 appm He whereas for the larger appm/dpa ratio, there is sufficient helium to stabilize the vacancies and grow into visible bubbles at a lower dose. These two trends are supported by other studies of dual-beam experiments [26,27,30].…”

Section: Effect Of Helium Appm/dpa Rate On the He Bubble Size And Numsupporting

confidence: 81%

“…F/M steels as well as austenitic steels). For instance, Monterrosa et al who carried out dual beam irradiations on bulk HT9 at 460 °C with 5 MeV Fe 2+ ions with helium appm/dpa from 0 to 0.2 with dpa values up to 188 dpa, followed by ex situ characterization [26] also reported a bubble size decrease and a density increase as the He appm/dpa ratio increased in the specific ranges of appm/dpa ratio values investigated. This shows by the way that in situ TEM ion irradiations led to similar trends as bulk ion irradiations in the same material.…”

Section: Effect Of Helium Appm/dpa Rate On the He Bubble Size And Nummentioning

confidence: 99%

See 2 more Smart Citations

Helium bubble nucleation and growth in alloy HT9 through the use of in situ TEM: Sequential he-implantation and heavy-ion irradiation versus dual-beam irradiation

Duemmler

Zheng

Baumier

et al. 2021

Journal of Nuclear Materials

View full text Add to dashboard Cite

The formation of He bubbles in Ferritic/Martensitic steel HT9 is investigated through the use of in situ Transmission Electron Microscopy coupled with He implantation and heavy ion irradiation. Of particular interest is the effect of increasing He appm/dpa ratio on the formation and growth of the bubbles, as well as the effect of the sequential order of ion irradiation i.e. Hepre-implantation followed by heavy-ion irradiation versus true dual-beam irradiation. The role of He is discussed.

show abstract

Section: On the Bubble Size Distribution Shape (Unimodal Versus Bimodsupporting

confidence: 82%

Section: Effect Of Helium Appm/dpa Rate On the He Bubble Size And Numsupporting

confidence: 81%

Section: Effect Of Helium Appm/dpa Rate On the He Bubble Size And Nummentioning

confidence: 99%

See 1 more Smart Citation

Helium bubble nucleation and growth in alloy HT9 through the use of in situ TEM: Sequential he-implantation and heavy-ion irradiation versus dual-beam irradiation

Duemmler

Zheng

Baumier

et al. 2021

Journal of Nuclear Materials

View full text Add to dashboard Cite

show abstract

“…Additionally, we investigated the role of the increase of C concentration near the sample surface, as secondary ion spectroscopy measurements (SIMS) have indicated the injection of carbon during the irradiation. The latter is, today, a well-known issue for ion irradiation facilities [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions

Castin

Dubinko

Bonny

et al. 2019

Journal of Nuclear Materials

View full text Add to dashboard Cite

The microstructure changes taking place in W under irradiation are governed by many factors, amongst which C impurities and their interactions with self-interstitial atoms (SIA). In this work, we specifically study this effect by conducting a dedicated 2-MeV self-ions irradiation experiment, at room temperature. Samples were irradiated up to 0.02, 0.15 and 1.2 dpa. Transmission electron microscopy (TEM) expectedly revealed a large density of SIA loops at all these doses. Surprisingly, however, the loop number density increased in a non-monotonous manner with the received dose. Performing chemical analysis with secondary ion spectroscopy measurements (SIMS), we find that our samples were likely contaminated by C injection during the irradiation. Employing an object kinetic Monte Carlo (OKMC) model for microstructure evolution, we demonstrate that the C injection is the likely factor explaining the evolution of loops number density. Our findings highlight the importance of the well-known issue of C injection during ion irradiation experiments, and demonstrate how OKMC models can help to rationalize this effect.

show abstract

“…Moreover, it needs to be highlighted that besides the carbon diffusion from the bulk, ion beam-induced uptake of carbon species and implantation into the sample surface may be also another major source for carbon enrichment in this shallow and amorphous sublayer. As discussed by some researchers [36,37,38,39], traces of gaseous species such as CH 4 , O 2 , CO and hydrocarbons are always present even in high vacuum chamber. During high-energy ion implantation, a significant amount of carbon will be deposited on the material surface or into the near-surface sublayer [38].…”

Section: Discussionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Ti + N Ion Implanted Cronidur30 Steel

2019

View full text Add to dashboard Cite

In this study, Ti + N ion implantation was used as a surface modification method for surface hardening and friction-reducing properties of Cronidur30 bearing steel. The structural modification and newly-formed ceramic phases induced by the ion implantation processes were investigated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and grazing incidence X-ray diffraction (GIXRD). The mechanical properties of the samples were tested by nanoindentation and friction experiments. The surface nanohardness was also improved significantly, changing from ~10.5 GPa (pristine substrate) to ~14.2 GPa (Ti + N implanted sample). The friction coefficient of Ti + N ion implanted samples was greatly reduced before failure, which is less than one third of pristine samples. Furthermore, the TEM analyses confirmed a trilamellar structure at the near-surface region, in which amorphous/ceramic nanocrystalline phases were embedded into the implanted layers. The combined structural modification and hardening ceramic phases played a crucial role in improving surface properties, and the variations in these two factors determined the differences in the mechanical properties of the samples.

show abstract

The influence of carbon on cavity evolution in ion-irradiated ferritic-martensitic steels

Cited by 22 publications

References 37 publications

Helium bubble nucleation and growth in alloy HT9 through the use of in situ TEM: Sequential he-implantation and heavy-ion irradiation versus dual-beam irradiation

Helium bubble nucleation and growth in alloy HT9 through the use of in situ TEM: Sequential he-implantation and heavy-ion irradiation versus dual-beam irradiation

The influence of carbon impurities on the formation of loops in tungsten irradiated with self-ions

Microstructure and Mechanical Properties of Ti + N Ion Implanted Cronidur30 Steel

Contact Info

Product

Resources

About