Effect of high-energy ball milling on the microstructure and mechanical properties of Ni-based ODS alloys fabricated using gas-atomized powder
- Authors
- Park, Chun Woong; Choi, Won June; Byun, Jongmin; Kim, Young Do
- Issue Date
- Oct-2022
- Publisher
- SPRINGER
- Citation
- JOURNAL OF MATERIALS SCIENCE, v.57, no.38, pp.18195 - 18204
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS SCIENCE
- Volume
- 57
- Number
- 38
- Start Page
- 18195
- End Page
- 18204
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/173027
- DOI
- 10.1007/s10853-022-07700-z
- ISSN
- 0022-2461
- Abstract
- In this study, the effects of high-energy ball milling of atomized powder on the microstructure and mechanical properties of a Ni-based oxide dispersion strengthened (ODS) alloy were analyzed. Ni-based ODS alloys were prepared via high-energy ball milling and spark plasma sintering using a gas-atomized powder. The atomized powder with a dendrite structure contains Ni5Y and Al2Ni6Y3 intermetallic compounds, which are not observed in conventional alloys fabricated using elemental powder. These intermetallic phases are refined and decomposed during high-energy ball milling, affecting the formation and dispersion of oxides, which alters the microstructure and mechanical properties of Ni-based ODS alloys. The Ni-based ODS alloys fabricated using ball-milled powders had finer oxide particles and improved oxide dispersion compared to those fabricated using atomized powders. The grain size of the Ni-based ODS alloys fabricated using ball-milled powder was significantly reduced because of the inhibition of grain growth during the sintering process. In addition, Ni-based ODS alloys fabricated using ball-milled powders exhibited improved hardness and high-temperature compressive strength.
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