TY - JOUR
T1 - No ball milling needed
T2 - Alternative ODS steel manufacturing with gas atomization reaction synthesis (GARS) and friction-based processing
AU - Zhang, D.
AU - Darsell, J. T.
AU - Wang, J.
AU - Ma, X.
AU - Grant, G. J.
AU - Anderson, I. E.
AU - Rieken, J. R.
AU - Edwards, D. J.
AU - Setyawan, W.
AU - Horn, T. J.
AU - Odette, G. R.
PY - 2022/8/1
Y1 - 2022/8/1
N2 - Oxide dispersion strengthened (ODS) steels are promising structural materials for future fusion reactors. The high-density (∼1023/m3) of highly stable Y-(Ti)-O nano-oxides provide high sink strength for radiation resistance and high-temperature (> 650 °C) creep strength. Concomitantly, helium management is enabled by trapping high density (∼1023/m3) of small (< 3 nm) helium bubbles in the vicinity of nano-oxides. However, conventional route of making ODS steels involves prolonged ball milling, canning, degassing, and laborious thermo-mechanical processing (TMP). Such route, especially the batch-by-batch ball milling step, faces persistent challenge with scalability and high costs. Gas atomization reaction synthesis (GARS) method has demonstrated the potential of making precursor ODS steel powders without ball milling, but the nano-oxide density was around 1021/m3 in the final consolidated form by conventional TMP. Taking advantage of GARS precursor powder, we use friction-based processing, including friction consolidation and extrusion, to manufacture ODS steel with further improved nano-oxide characteristics. Preliminary results showed that Y/Ti/O species were intimately mixed and rapidly reacted to form nano-oxides with a number density of ∼1022/m3. © 2022 Elsevier B.V. All rights reserved.
AB - Oxide dispersion strengthened (ODS) steels are promising structural materials for future fusion reactors. The high-density (∼1023/m3) of highly stable Y-(Ti)-O nano-oxides provide high sink strength for radiation resistance and high-temperature (> 650 °C) creep strength. Concomitantly, helium management is enabled by trapping high density (∼1023/m3) of small (< 3 nm) helium bubbles in the vicinity of nano-oxides. However, conventional route of making ODS steels involves prolonged ball milling, canning, degassing, and laborious thermo-mechanical processing (TMP). Such route, especially the batch-by-batch ball milling step, faces persistent challenge with scalability and high costs. Gas atomization reaction synthesis (GARS) method has demonstrated the potential of making precursor ODS steel powders without ball milling, but the nano-oxide density was around 1021/m3 in the final consolidated form by conventional TMP. Taking advantage of GARS precursor powder, we use friction-based processing, including friction consolidation and extrusion, to manufacture ODS steel with further improved nano-oxide characteristics. Preliminary results showed that Y/Ti/O species were intimately mixed and rapidly reacted to form nano-oxides with a number density of ∼1022/m3. © 2022 Elsevier B.V. All rights reserved.
KW - Atom Probe Tomography
KW - Electron Microscopy
KW - Friction Consolidation and Extrusion
KW - Gas Atomization Reaction Synthesis
KW - ODS Steel
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U2 - 10.1016/j.jnucmat.2022.153768
DO - 10.1016/j.jnucmat.2022.153768
M3 - RGC 21 - Publication in refereed journal
SN - 0022-3115
VL - 566
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
M1 - 153768
ER -
