Effects of 600 MeV proton irradiation on nucleation and growth of precipitates and helium bubbles in a high-purity Al-Mg-Si alloy

1986 ◽  
Vol 141-143 ◽  
pp. 743-747 ◽  
Author(s):  
B.N. Singh ◽  
T. Leffers ◽  
M. Victoria ◽  
W.V. Green ◽  
D. Gavillet
Keyword(s):  
High Purity ◽  
Proton Irradiation ◽  
Nucleation And Growth ◽  
Helium Bubbles

Nucleation and growth of precipitates and helium bubbles in a high-purity AlMgSi alloy irradiated with 600 MeV protons

1988 ◽  
Vol 155-157 ◽  
pp. 1075-1078 ◽  
Author(s):  
M. Victoria ◽  
W.V. Green ◽  
D. Gavillet ◽  
B.N. Singh ◽  
T. Leffers
Keyword(s):  
High Purity ◽  
Nucleation And Growth ◽  
Helium Bubbles ◽  
Mev Protons

Observations oh Nucleation and Growth of Voids in Nickel

1970 ◽  
Vol 28 ◽  
pp. 414-415
Author(s):  
J. L. Brimhall ◽  
H. E. Kissinger ◽  
B. Mastel
Keyword(s):  
High Purity ◽  
Growth Stage ◽  
Elevated Temperatures ◽  
Early Growth ◽  
Nucleation And Growth ◽  
Pure Nickel ◽  
Different Temperatures ◽  
Total Fluence ◽  
Neutron Exposure ◽  
Growth Of Voids

Some information on the size and density of voids that develop in several high purity metals and alloys during irradiation with neutrons at elevated temperatures has been reported as a function of irradiation parameters. An area of particular interest is the nucleation and early growth stage of voids. It is the purpose of this paper to describe the microstructure in high purity nickel after irradiation to a very low but constant neutron exposure at three different temperatures.Annealed specimens of 99-997% pure nickel in the form of foils 75μ thick were irradiated in a capsule to a total fluence of 2.2 × 1019 n/cm2 (E > 1.0 MeV). The capsule consisted of three temperature zones maintained by heaters and monitored by thermocouples at 350, 400, and 450°C, respectively. The temperature was automatically dropped to 60°C while the reactor was down.

scholarly journals Nucleation and growth of helium bubbles in aluminum between 20 and 900 K

1988 ◽  
Vol 38 (2) ◽  
pp. 1087-1094 ◽  
Author(s):  
H. Rajainmäki ◽  
S. Linderoth ◽  
H. E. Hansen ◽  
R. M. Nieminen ◽  
M. D. Bentzon
Keyword(s):  
Nucleation And Growth ◽  
Helium Bubbles

Dislocation loops in ultra-high purity Fe(Cr) alloys after 7.2 MeV proton irradiation

2018 ◽  
Vol 503 ◽  
pp. 81-90 ◽  
Author(s):  
J. Chen ◽  
F. Duval ◽  
P. Jung ◽  
R. Schäublin ◽  
N. Gao ◽  
...  
Keyword(s):  
High Purity ◽  
Proton Irradiation ◽  
Dislocation Loops ◽  
Ultra High Purity

scholarly journals An Overview of Recent Standard and Accelerated Molecular Dynamics Simulations of Helium Behavior in Tungsten

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2500 ◽  
Author(s):  
Luis Sandoval ◽  
Danny Perez ◽  
Blas P. Uberuaga ◽  
Arthur F. Voter
Keyword(s):  
Molecular Dynamics ◽  
Nucleation And Growth ◽  
High Melting ◽  
High Melting Point ◽  
Fusion Power ◽  
Helium Bubbles ◽  
Accelerated Molecular Dynamics ◽  
Plasma Facing Materials ◽  
Sputtering Yield ◽  
Dynamics Simulations

One of the most critical challenges for the successful adoption of nuclear fusion power corresponds to plasma-facing materials. Due to its favorable properties in this context (low sputtering yield, high thermal conductivity, high melting point, among others), tungsten is a leading candidate material. Nevertheless, tungsten is affected by the plasma and fusion byproducts. Irradiation by helium nuclei, in particular, strongly modifies the surface structure by a synergy of processes, whose origin is the nucleation and growth of helium bubbles. In this review, we present recent advances in the understanding of helium effects in tungsten from a simulational approach based on accelerated molecular dynamics, which emphasizes the use of realistic parameters, as are expected in experimental and operational fusion power conditions.

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