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

    425 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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