Investigation of spatial relationship between helium bubbles and dislocation loops in RAFM steel

2021 ◽  
Vol 548 ◽  
pp. 152862
Author(s):  
Weiping Zhang ◽  
Ligang Song ◽  
Te Zhu ◽  
Yi Xiong ◽  
Hailiang Ma ◽  
...  
Keyword(s):  
Spatial Relationship ◽  
Dislocation Loops ◽  
Helium Bubbles ◽  
Rafm Steel

Formation of helium bubbles and dislocation loops in tritium-charged vanadium

1983 ◽  
Vol 78 (1-4) ◽  
pp. 165-176 ◽  
Author(s):  
W. JäGer ◽  
R. LäSser ◽  
T. Schober ◽  
G. J. Thomas
Keyword(s):  
Dislocation Loops ◽  
Helium Bubbles

Quantitative TEM Investigations on EUROFER 97 Irradiated up to 32 Dpa

2010 ◽  
Vol 73 ◽  
pp. 118-123 ◽  
Author(s):  
Oliver J. Weiss ◽  
Ermile Gaganidze ◽  
Jarir Aktaa
Keyword(s):  
Quantitative Data ◽  
Dose Dependence ◽  
Volume Density ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Transmission Electron ◽  
Rafm Steel ◽  
Induced Defects ◽  
Irradiation Induced Defects ◽  
Eurofer 97

The objective of this work is to evaluate the microstructure of the neutron-irradiated reduced activation ferritic/martensitic (RAFM) steel EUROFER 97. For this purpose irradiation induced defects like defect clusters, dislocation loops, voids/bubbles and precipitates are identified by transmission electron microscopy (TEM) and quantified in size and volume density. Emphasis is put on analyzing the influence of the irradiation dose and neutron fluxe on the evolution of size and density of the defects at irradiation temperatures between 300 and 335 °C. A first sample irradiated to a dose of 31.8 dpa was analyzed. The irradiation was carried out in the BOR 60 fast reactor of JSC “SSC RIAR” in Dimitrovgrad, within the framework of the ARBOR-1 irradiation program. To study the dose dependence in a next step the results will be compared to quantitative data on samples irradiated to a dose of 15 dpa. The obtained quantitative data will be used for correlation of the changes in the microstructure to the changes in the mechanical properties and will serve as an input for models describing this correlation.

scholarly journals Correlative TEM and APT of Helium Bubbles in Ion-Irradiated RAFM Steel

2015 ◽  
Vol 21 (S3) ◽  
pp. 587-588 ◽  
Author(s):  
B. Mazumder ◽  
C. M. Parish ◽  
M. K. Miller
Keyword(s):  
Helium Bubbles ◽  
Rafm Steel

scholarly journals Growth Rate Effects on the Formation of Dislocation Loops Around Deep Helium Bubbles in Tungsten

2017 ◽  
Vol 71 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Luis Sandoval ◽  
Danny Perez ◽  
Blas P. Uberuaga ◽  
Arthur F. Voter
Keyword(s):  
Growth Rate ◽  
Dislocation Loops ◽  
Helium Bubbles ◽  
Rate Effects

scholarly journals Investigation of Helium Behavior in RAFM Steel by Positron Annihilation Doppler Broadening and Thermal Desorption Spectroscopy

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1523
Author(s):  
Zhenyu Shen ◽  
Liping Guo ◽  
Weiping Zhang ◽  
Shuoxue Jin ◽  
Xingzhong Cao ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Thermal Desorption ◽  
Thermal Desorption Spectroscopy ◽  
Binding Energies ◽  
Doppler Broadening ◽  
Martensitic Steels ◽  
Helium Bubbles ◽  
Different Temperatures ◽  
Higher Temperature ◽  
Rafm Steel

The behavior of helium in reduced-activation ferritic/martensitic steels was investigated systematically with positron annihilation Doppler broadening measurement and thermal desorption spectroscopy. Specimens were irradiated with helium ions with different energies to various fluences at different temperatures. A threshold fluence was observed above which the rate of formation and growth of helium bubbles dramatically increased. Irradiation at higher temperature could suppress the formation and growth of HenVm clusters with low binding energies and enhance that of helium bubbles and HenVm clusters with high binding energies. Different changes of S parameters were observed in various depth after the irradiation temperature was increased from 523 K to 723 K. Irradiation of 18 keV-He+ enhanced the growth of HenVm clusters and helium bubbles compared with 100 keV-He+ irradiation. A possible mechanism is discussed.

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