Optimization of microstructure for superplasticity using equalchannel angular pressing

M. Furukawa, K. Oh-ishi, S. Komura, A. Yamashita, Z. Horita, M. Nemoto, T. G. Langdon

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    Equal-channel angular (ECA) pressing is a processing procedure which may be used to introduce ultrafine-grained structures into metallic materials. Thus, materials processed by EGA pressing have a potential capability for superplasticity, especially under conditions of very high strain rates. This paper reports an investigation of the thermal stability associated with the ultrafine grain sizes introduced into samples of pure aluminum and several Al-based alloys. It is demonstrated that the stability of these ultrafine grains at elevated temperatures, under the conditions where superplasticity is anticipated, requires the presence of particles to restrict the movement of the grain boundaries.

    Original languageEnglish
    Pages (from-to)97-102
    Number of pages6
    JournalMaterials Science Forum
    Volume304-306
    Publication statusPublished - Dec 1 1999

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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