Evolution of submicrocrystalline iron containing dispersed oxides under mechanical milling followed by consolidation

Andrey Belyakov, Y. Sakai, T. Hara, Y. Kimura, K. Tsuzaki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The changes an pct alloy during milling by structural in Fe-0.6 pet O mechanical milling followed consolidation through rolling were studied. The iron-iron oxide powders were mechanically milled in an argon atmosphere for various times from 20 to 300 hours. The powders were then canned into a steel pipe and multiple rolled at 700 °C for consolidation. The microstructure of the final product depended significantly on the milling time. The volume fraction of the dispersed oxides (10 nm in diameter) increased from about 0.3 to 2.5 pct when the milling time was increased from 20 to 300 hours. The relatively short milling time of 20 hours resulted in the evolution of elongated grains (an average size of about 1.2 μm) with a large fraction of low-angle grain boundaries after consolidation. In contrast, much finer grains (about 0.2 μm in size) with a near random grain-boundary misorientation distribution evolved in the samples milled for 300 hours.

Original languageEnglish
Article number310
Pages (from-to)3241-3248
Number of pages8
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume33
Issue number10
DOIs
Publication statusPublished - Jan 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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