Influence of channel angle on the development of ultrafine grains in equal-channel angular pressing

Kiyotaka Nakashima, Zenji Horita, Minoru Nemoto, Terence G. Langdon

Research output: Contribution to journalArticlepeer-review

411 Citations (Scopus)

Abstract

Equal-channel angular pressing provides a convenient procedure for introducing an ultrafine grain size into a material. Using samples of pure Al, tests were conducted to determine the influence of the channel angle Φ, defined as the angle of intersection of the two channels within the die, on the subsequent microstructure attained by pressing. Experiments were performed using dies having channel angles from 90 to 157.5°. The results show that an ultrafine microstructure of essentially equiaxed grains, separated by high angle grain boundaries, is achieved only when a very intense plastic strain is imposed on the sample in each passage through the die as when using a die having a channel angle of Φ close to 90°

Original languageEnglish
Pages (from-to)1589-1599
Number of pages11
JournalActa Materialia
Volume46
Issue number5
DOIs
Publication statusPublished - Mar 2 1998

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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