Coupled motion of grain boundaries in bcc tungsten as a possible radiation-damage healing mechanism under fusion reactor conditions

2013 ◽  
Vol 53 (6) ◽  
pp. 063001 ◽  
Author(s):  
Valery Borovikov ◽  
Xian-Zhu Tang ◽  
Danny Perez ◽  
Xian-Ming Bai ◽  
Blas P. Uberuaga ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Radiation Damage ◽  
Fusion Reactor ◽  
Coupled Motion ◽  
Damage Healing

The nucleation of cavities at grain boundaries

1987 ◽  
Vol 45 ◽  
pp. 288-291
Author(s):  
P. J. Goodhew
Keyword(s):  
Surface Tension ◽  
Surface Energy ◽  
Grain Boundaries ◽  
Radiation Damage ◽  
Impurity Concentration ◽  
Driving Force ◽  
Nucleation And Growth ◽  
Phase Boundaries ◽  
Cavity Nucleation ◽  
Spherical Bubble

Cavity nucleation and growth at grain and phase boundaries is of concern because it can lead to failure during creep and can lead to embrittlement as a result of radiation damage. Two major types of cavity are usually distinguished: The term bubble is applied to a cavity which contains gas at a pressure which is at least sufficient to support the surface tension (2g/r for a spherical bubble of radius r and surface energy g). The term void is generally applied to any cavity which contains less gas than this, but is not necessarily empty of gas. A void would therefore tend to shrink in the absence of any imposed driving force for growth, whereas a bubble would be stable or would tend to grow. It is widely considered that cavity nucleation always requires the presence of one or more gas atoms. However since it is extremely difficult to prepare experimental materials with a gas impurity concentration lower than their eventual cavity concentration there is little to be gained by debating this point.

Impact of Deuterium Plasma Flux on Fusion Reactor Materials: Radiation Damage, Surface Modification, Erosion

2021 ◽  
Vol 84 (7) ◽  
pp. 1252-1258
Author(s):  
B. I. Khripunov ◽  
V. S. Koidan ◽  
A. I. Ryazanov ◽  
V. M. Gureev ◽  
S. T. Latushkin ◽  
...  
Keyword(s):  
Surface Modification ◽  
Radiation Damage ◽  
Fusion Reactor ◽  
Plasma Flux ◽  
Deuterium Plasma ◽  
Reactor Materials

scholarly journals Cavity Evolution at Grain Boundaries as a Function of Radiation Damage and Thermal Conditions in Nanocrystalline Nickel

2015 ◽  
Vol 4 (2) ◽  
pp. 96-103 ◽  
Author(s):  
Brittany Muntifering ◽  
Sarah Jane Blair ◽  
Cajer Gong ◽  
Aaron Dunn ◽  
Remi Dingreville ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Radiation Damage ◽  
Thermal Conditions ◽  
Nanocrystalline Nickel ◽  
Cavity Evolution

scholarly journals The Sensitivity of the First Wall Radiation Damage to Fusion Reactor Blanket Composition

1978 ◽  
Vol 40 (3) ◽  
pp. 348-451
Author(s):  
J. M. Barnes ◽  
R. T. Santoro ◽  
T. A. Gabriel
Keyword(s):  
Radiation Damage ◽  
Fusion Reactor ◽  
First Wall ◽  
Fusion Reactor Blanket

Effects of H segregation on shear-coupled motion of 〈110〉 grain boundaries in α-fe

2019 ◽  
Vol 44 (33) ◽  
pp. 18616-18627 ◽  
Author(s):  
Jiaqing Li ◽  
Cheng Lu ◽  
Linqing Pei ◽  
Che Zhang ◽  
Rui Wang ◽  
...  
Keyword(s):  
Grain Boundaries ◽  
Coupled Motion

Radiation Damage Related to Fusion Reactors Materials

1982 ◽  
Vol 40 ◽  
pp. 584-587
Author(s):  
J. L. Brimhall
Keyword(s):  
Radiation Damage ◽  
Fusion Reactor ◽  
Fission Neutron ◽  
Energy Spectra ◽  
Radiation Environment ◽  
Fission Reactor ◽  
Transmission Electron ◽  
Damage States ◽  
Reactor Materials ◽  
Fission Reactors

Transmission electron microscopy has long been used to study the microstructual evolution in materials as a result of radiation damage. The radiation environment in a fusion reactor is unlike that in well-studied fission reactors, therefore unique microstructures in fusion reactor materials may occur. The fusion reactor energy spectra will be strongly peaked at 14 MeV, whereas typical fission neutron energy spectra are peaked in the range 0.5 to 1.0 MeV We need to know how this higher energy neutron spectra in a fusion reactor will perturb the radiation damage states normally observed in fission reactor irradiations.

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