Morphology and Evolution of 14Cr Powder During Mechanical Alloying for Oxide Dispersion Strengthened Ferritic Alloys
- University of Tennessee, Knoxville, TN 37996 (United States)
- Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)
Oxide Dispersion Strengthened (ODS) Ferritic steel alloys are candidate materials for Generation IV and Fusion reactor concepts due to their high temperature material properties and their irradiation stability. However, these material properties are strongly influenced by nanocluster dispersion and grain size distributions, which are directly correlated to mechanical alloying methodologies and parameters. Current powder processing strategies use ball milling times greater than or equal to 40 hrs to achieve sufficient dispersoid, i.e Y{sub 2}O{sub 3}, incorporation within the metal matrix, but these time intensive milling cycles are neither practical nor economical. This work aims to investigate how the particle morphology evolves during mechanical alloying during the processing of a 14Cr ODS ferritic alloy, and if higher-intensity milling, shorter milling cycles can still achieve sufficient mixing of yttria in comparison to the dispersion and incorporation observed in conventional lower-intensity milling methodologies. Comparisons of milled particle size distributions are presented for low and high intensity milling cycles, while microscopy and high-temperature tensile data are presented for consolidated samples using higher-intensity milling parameters. (authors)
- OSTI ID:
- 23042636
- Journal Information:
- Transactions of the American Nuclear Society, Vol. 115; Conference: 2016 ANS Winter Meeting and Nuclear Technology Expo, Las Vegas, NV (United States), 6-10 Nov 2016; Other Information: Country of input: France; available from American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (US); ISSN 0003-018X
- Country of Publication:
- United States
- Language:
- English
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