Damage Behavior of Electron/Helium Dual-Beam Irradiation on Fe-Cr-Mn (W, V) Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 1463-1466
Author(s):  
Benfu Hu ◽  
Hisao Kinoshita ◽  
Tamaki Shibayama ◽  
H. Takahashi
Keyword(s):  
Dislocation Density ◽  
Void Nucleation ◽  
Solute Concentration ◽  
Irradiation Damage ◽  
Beam Irradiation ◽  
Damage Behavior ◽  
Void Swelling ◽  
Dual Beam ◽  
Helium Ion ◽  
Carbide Matrix

The effect of helium on irradiation damage behavior in Fe-Cr-Mn(W,V) steel was investigated by electron/helium ion dual-beam irradiation. The results indicate that helium can promote the increase of dislocation density and enhance the void nucleation and void swelling of Fe-Cr-Mn(W、V) alloy. The segregation of solute elements near grain boundary was suppressed by existence of helium. Also the interface of carbide-matrix migration and the change of solute concentration near the interface were observed during dual-beam irradiation.

Effect of laser beam thermal shock on the helium ion irradiation damage behavior of W-TiC-Y2O3 composites

2018 ◽  
Vol 509 ◽  
pp. 198-203 ◽  
Author(s):  
Meng–Yao Xu ◽  
Lai–Ma Luo ◽  
Yue Xu ◽  
Xiang Zan ◽  
Qiu Xu ◽  
...  
Keyword(s):  
Laser Beam ◽  
Thermal Shock ◽  
Ion Irradiation ◽  
Irradiation Damage ◽  
Damage Behavior ◽  
Helium Ion

scholarly journals Effect of Helium and Aging Treatment on Radiation Damage Behavior in Low Activation Fe-Cr-Mn (W, V) Alloy

2005 ◽  
Vol 475-479 ◽  
pp. 1455-1458
Author(s):  
Hisao Kinoshita ◽  
Benfu Hu ◽  
H. Takahashi
Keyword(s):  
Radiation Damage ◽  
Aging Time ◽  
Aging Temperature ◽  
Cavity Growth ◽  
Aging Treatment ◽  
Beam Irradiation ◽  
Damage Behavior ◽  
Voltage Electron ◽  
Dual Beam ◽  
Cavity Growth Rate

The effects of helium and aging treatment on radiation damage behavior in low activation Fe-Cr-Mn ( W, V) alloy were investigated by electron and helium ion dual-beam irradiation in a high voltage electron microscope. Specimens were aged at 673 K, 823 K and 923 K for 1000, 3000 and 10000 hours. Electron and He ion dual-beam irradiations were performed at 627 K to 10 dpa. M23C6 type carbides were precipitated in the aged specimens, and the amount of the precipitates was increased with increasing aging temperature and aging time. He bubbles were formed during dual-beam irradiation in all of the specimens. The cavity swelling under dual-beam irradiations was increased with increasing the aging temperature and aging time. It was suggested that cavity swelling is closely related to the concentration of solutes such as Cr and C in the matrix, namely cavity growth rate becomes higher with decreasing of the solutes in solution.

Damage Behavior of Electron/Helium Dual-Beam Irradiation on Fe-Cr-Mn (W, V) Alloy

2005 ◽  
pp. 1463-1466
Author(s):  
Benfu Hu ◽  
Hisao Kinoshita ◽  
Tamaki Shibayama ◽  
H. Takahashi
Keyword(s):  
Beam Irradiation ◽  
Damage Behavior ◽  
Dual Beam

Influence of helium ion irradiation damage behavior after laser thermal shock of W-2%vol Y2O3 composites

2020 ◽  
Vol 121 ◽  
pp. 103241 ◽  
Author(s):  
Gang Yao ◽  
Xiao-Yue Tan ◽  
Lai-Ma Luo ◽  
Xiang Zan ◽  
Yue Xu ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Ion Irradiation ◽  
Irradiation Damage ◽  
Damage Behavior ◽  
Helium Ion

Effect of He-Injection on Irradiation Damage of High Mn-Cr Steel

2005 ◽  
Vol 475-479 ◽  
pp. 1425-1428
Author(s):  
Dong Su Bae ◽  
Sang Ll Lee ◽  
Seung Hoon Nahm ◽  
J.W. Choi ◽  
H. Takahashi
Keyword(s):  
Electron Beam ◽  
Grain Boundary ◽  
Electron Beam Irradiation ◽  
Boundary Migration ◽  
Void Formation ◽  
Irradiation Damage ◽  
Irradiation Condition ◽  
Beam Diameter ◽  
Beam Irradiation ◽  
Dual Beam

The high Mn-Cr austenitic steel for structure material of nuclear and/or fusion reactors from the point of view of the reduced radio-activation has been irradiated by using three irradiation modes of electron-beam irradiation, electron-beam irradiation after He-injection and electron/He+-ion dual-beam irradiation in 1250kV high voltage electron microscope (HVEM) connected with an ion accelerators to study the effect of He-injection on irradiation damage. Irradiation-induced segregation analyses were carried out by an energy dispersive X-ray analyzer (EDX) in a 200kV FE-TEM with beam diameter of about 0.5nm. Void formation was not observed in each irradiation condition. Grain boundary migration was observed in the case of electron/He+-ion dual-beam irradiation. Irradiation-induced segregations of Cr and Mn at grain boundary were observed in each irradiation condition. The amounts of Cr and Mn segregation decreased in the cases of electron-beam irradiation after He-injection compared with other irradiation conditions.

A Study of Electron Beam Irradiation Influence on Device Contact Junction Characteristics of Advanced DRAM Using Atomic Force Probing

2013 ◽  
Author(s):  
Wei-Chih Wang ◽  
Jian-Shing Luo
Keyword(s):  
Electron Beam ◽  
Electron Beam Irradiation ◽  
Forward Bias ◽  
Irradiation Damage ◽  
Beam Irradiation ◽  
Excess Current ◽  
Atomic Force ◽  
Order Of Magnitude ◽  
Voltage Contrast ◽  
Acceleration Voltage

Abstract In this paper, we revealed p+/n-well and n+/p-well junction characteristic changes caused by electron beam (EB) irradiation. Most importantly, we found a device contact side junction characteristic is relatively sensitive to EB irradiation than its whole device characteristic; an order of magnitude excess current appears at low forward bias region after 1kV EB acceleration voltage irradiation (Vacc). Furthermore, these changes were well interpreted by our Monte Carlo simulation results, the Shockley-Read Hall (SRH) model and the Generation-Recombination (G-R) center trap theory. In addition, four essential examining items were suggested and proposed for EB irradiation damage origins investigation and evaluation. Finally, by taking advantage of the excess current phenomenon, a scanning electron microscope (SEM) passive voltage contrast (PVC) fault localization application at n-FET region was also demonstrated.

Spontaneous formation of nanometer-scale self-organized structures in Ag-Cu alloys under irradiation

2000 ◽  
Vol 647 ◽  
Author(s):  
Raúl A. Enrique ◽  
Pascal Bellon
Keyword(s):  
Ion Irradiation ◽  
Ion Beam ◽  
Solute Concentration ◽  
Irradiation Temperature ◽  
Nanometer Scale ◽  
Beam Irradiation ◽  
X Ray Diffraction ◽  
Ion Beam Irradiation ◽  
Self Organized ◽  
The One

AbstractIon-beam irradiation can be used as a processing tool to synthesize metastable materials. A particular case is the preparation of solid solutions from immiscible alloys, which have been achieved for a whole range of systems. In this process, enhanced solute concentration is obtained through the local mixing induced by each irradiation event, which if occurring at a high enough frequency, can outweigh demixing by thermal diffusion. The resulting microstructure forms in far from equilibrium conditions, and theoretical results for these kind of driven alloys have shown that novel microstructures exhibiting self-organization can develop. To test these predictions, we prepare Ag-Cu multilayered thin films that we subject to 1 MeV Kr+-ion irradiation at temperatures ranging from room temperature to 225 °C, and characterize the specimens by x-ray diffraction, TEM and STEM. We observe two different phenomena occurring at different length scales: On the one hand, regardless of the irradiation temperature, grains grow under irradiation until reaching a size limited by film thickness (~200 nm). On the other hand, the distribution of species inside the grains is greatly affected by the irradiation temperature. At intermediate temperatures, a semi-coherent decomposition is observed at a nanometer scale. This nanometer-scale decomposition phenomenon appears as an evidence of patterning, and thus confirms on the possibility of using ion-beam irradiation as a route to synthesize nanostructured materials with novel magnetic and optical properties.

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