Effects of milling parameters on the microstructure and Charpy impact properties of MA/ODS ferritic steels

Noriyuki Y. Iwata, Ryuta Kasada, Akihiko Kimura, Takanari Okuda

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

ODS ferritic steels were produced by mechanical alloying (MA) in either attritor or planetary ball mills under argon atmosphere and hot extrusion. Milling in argon with controlling excess oxygen (Ex.O) and nitrogen was effective to reduce the particle size of MA powders. Coarse Al2O3 particles and fine AlN precipitates were found to be formed in an Al added steel when the Ex.O and nitrogen concentrations are increased. Lowering the Ex.O and nitrogen concentrations in ODS ferritic steels acted as a key parameter for enhancing their impact properties.

Original languageEnglish
Pages (from-to)24-28
Number of pages5
JournalFusion Engineering and Design
Volume126
DOIs
Publication statusPublished - 2018 Jan

Keywords

  • Charpy impact property
  • Mechanical alloying
  • Microstructure
  • Milling parameters
  • ODS ferritic steel

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Effects of milling parameters on the microstructure and Charpy impact properties of MA/ODS ferritic steels'. Together they form a unique fingerprint.

Cite this