Deformation microstructures

N. Hansen, X. Huang, D.A. Hughes

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Microstructural characterization and modeling has shown that a variety of metals deformed by different thermomechanical processes follows a general path of grain subdivision, by dislocation boundaries and high angle boundaries. This subdivision has been observed to very small structural scales of the order of 10 nm, produced by deformation under large sliding loads. Limits to the evolution of microstructural parameters during monotonic loading have been investigated based on a characterization by transmission electron microscopy. Such limits have been observed at an equivalent strain of about 10 for the misorientation angle and the density of high angle boundaries. However, the spacing between boundaries decreases with increasing strain without saturation even at extreme strains. The observed changes in microstructural parameters lead to a discussion of the flow stress/strain relationship.
    Original languageEnglish
    Title of host publicationUltrafine grained materials 3
    EditorsY.T. Zhu, T.G. Langdon, R.Z. Valiev
    Place of PublicationWarrendale, PA
    PublisherMinerals, Metals and Materials Society
    Publication date2004
    Pages67-74
    ISBN (Print)0-87339-571-9
    Publication statusPublished - 2004
    Event133rd Annual Meeting & Exhibition of The Minerals, Metals & Materials Society (TMS) - Charlotte, NC, United States
    Duration: 14 Mar 200418 Mar 2004
    http://www.tms.org/meetings/annual-04/annmtg04home.html

    Conference

    Conference133rd Annual Meeting & Exhibition of The Minerals, Metals & Materials Society (TMS)
    CountryUnited States
    CityCharlotte, NC
    Period14/03/200418/03/2004
    Internet address

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