Nanocrystalline metals are considered highly radiation-resistant materials due to their large grain boundary areas. Here, the existence of a grain size threshold for enhanced irradiation resistance in high-temperature helium-irradiated nanocrystalline and ultrafine tungsten is demonstrated. Average bubble density, projected bubble area and the corresponding change in volume were measured via transmission electron microscopy and plotted as a function of grain size for two ion fluences. Nanocrystalline grains of less than 35 nm size possess similar to 10-20 times lower change in volume than ultrafine grains and this is discussed in terms of the grain boundaries defect sink efficiency. [GRAPHICS] . IMPACT STATEMENT A grain size threshold in nanocrystalline and ultrafine tungsten has been shown to exist for enhanced irradiation-resistance performance during high-temperature helium irradiation.
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Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Bai, Xian-Ming
Voter, Arthur F.
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Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Voter, Arthur F.
Hoagland, Richard G.
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Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Hoagland, Richard G.
Nastasi, Michael
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Los Alamos Natl Lab, MPA CINT, Mat Phys & Applicat Div, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Nastasi, Michael
Uberuaga, Blas P.
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Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
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Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
El-Atwani, Osman
Guo, Yang
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Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA
Purdue Univ, Ctr Mat Proc & Tribol, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
Guo, Yang
Klenosky, Daniel R.
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Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
机构:
Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Bai, Xian-Ming
Voter, Arthur F.
论文数: 0引用数: 0
h-index: 0
机构:
Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Voter, Arthur F.
Hoagland, Richard G.
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h-index: 0
机构:
Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Hoagland, Richard G.
Nastasi, Michael
论文数: 0引用数: 0
h-index: 0
机构:
Los Alamos Natl Lab, MPA CINT, Mat Phys & Applicat Div, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
Nastasi, Michael
Uberuaga, Blas P.
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h-index: 0
机构:
Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USALos Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA
机构:
Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
El-Atwani, Osman
Guo, Yang
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h-index: 0
机构:
Purdue Univ, Sch Ind Engn, W Lafayette, IN 47907 USA
Purdue Univ, Ctr Mat Proc & Tribol, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA
Guo, Yang
Klenosky, Daniel R.
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h-index: 0
机构:
Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USAPurdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA