The influence of helium on the bulk properties of fusion reactor structural materials

Ullmaier, H.

doi:10.1088/0029-5515/24/8/009

Cited by 369 publications

(122 citation statements)

References 111 publications

Supporting

Mentioning

115

Contrasting

Unclassified

Order By: Relevance

“…Helium is known to have an important influence on radiation-induced swelling and subsequent embrittlement in other materials [32]. Helium atoms can stabilize vacancies and small voids and lower the critical radius for cavity growth [33].…”

Section: Vacancies In Plutonium Studied By Positron Annihilationmentioning

confidence: 99%

Electronic structure calculations of vacancies and their influence on materials properties

Sterne

Howell

1998

Computational Materials Science

View full text Add to dashboard Cite

August 1997This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. PREPRINTThis paper was prepared for submittal to the DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.

show abstract

Section: Vacancies In Plutonium Studied By Positron Annihilationmentioning

confidence: 99%

Electronic structure calculations of vacancies and their influence on materials properties

Sterne

Howell

1998

Computational Materials Science

View full text Add to dashboard Cite

show abstract

“…It is well known that the presence of GB helium bubbles can cause substantial loss of ductility of irradiated materials at elevated temperatures [3,5]. The helium bubbles grow rapidly under the influences of high temperature and tensile stress.…”

Section: Introductionmentioning

confidence: 99%

The feasibility of welding irradiated materials

Lin

Chin

1991

Journal of Nuclear Materials

View full text Add to dashboard Cite

Helium was implanted into solution-annealed (SA) 316 stainless steel, 20% cold-worked (CW) 316 stainless steel and titanium-modified Primary Candidate Alloy (PCA) through tritium decay to levels ranging from 0.18 to 256 appm.Full penetration welds were then made on helium-doped materials using gas tungsten arc welding (GTAW) under fully constrained conditions. Intergranular heat-affected zone (HAZ) cracking was observed in all of the materials containing greater than 1 appm He. Electron microscopy showed that the HAZ cracking originated from the growth and coalescence of grain boundary (GB) helium bubbles. Bubble growth kinetics in the HAZ is explained by stressenhanced diffusive cavity growth. Results suggest that the propensity for HAZ cracking can be reduced by the preexisting cold-worked structure and by finely-distributed MC precipitates that refine the distribution of helium bubbles and minimize the flow of vacancies in grain boundaries.

show abstract

“…7) However, there are no experimental data on particle reflection coefficients in the low-energy region of less than 10 eV, and the theoretical model indicates that there is no significant energy dependence in the low energy region. 8) Further study is required to make clear the mechanism.…”

Section: Dependence Of Hole Structure On Incident Ion Energymentioning

confidence: 99%

Micron-Bubble Formation on Polycrystal Tungsten due to Low-Energy and High-Flux Helium Plasma Exposure

et al. 2005

View full text Add to dashboard Cite

Surface modification of polycrystal tungsten due to low-energy and high-flux helium plasma exposure was investigated. Micron-sized holes and bubbles were formed on the surface at a surface temperature of 2200 K even when the incident ion energy of helium was 10 eV. Hole formation was significantly reduced on the surface when the incident ion energy of helium was around 5 eV and no surface modification was seen at less than 5 eV. Coalescence of micron-sized helium bubbles was observed in the cross section of a W sample.

show abstract

The influence of helium on the bulk properties of fusion reactor structural materials

Cited by 369 publications

References 111 publications

Electronic structure calculations of vacancies and their influence on materials properties

Electronic structure calculations of vacancies and their influence on materials properties

The feasibility of welding irradiated materials

Micron-Bubble Formation on Polycrystal Tungsten due to Low-Energy and High-Flux Helium Plasma Exposure

Contact Info

Product

Resources

About