Recent studies have revealed that ultrafine-grained (UFG) metals and alloys produced by severe plastic deformation (SPD) can demonstrate extraordinary superplasticity at low temperatures and/or high strain rates. This work presents new results on superplasticity in several UFG Al and Ti alloys focusing on microstructural evolution and strain hardening, as well as the challenges of their application. Grain refinement in these alloys was accomplished using severe plastic deformation techniques, including new modifications of equal channel angular pressing (ECAP). Unusual behavior of UFG alloys originates both from the formation of ultrafine grain by SPD processing as well as the state of grain boundaries in these materials. It is established that superplastic deformation allowed not only to attain their efficient forming, but also to improve the ultrafinegrained structure and to obtain enhanced mechanical properties in the articles produced. The results demonstrate the possibilities of new applications of superplastic forming using bulk nanostructured materials.

Original languageEnglish
Title of host publicationSuperplasticity in Advanced Materials, ICSAM 2015
EditorsGoroh Itoh, Junya Kobayashi, Koichi Kitazono, Eiichi Sato, Yoshimasa Takayama, Takaomi Itoi, Koji Morita
PublisherTrans Tech Publications Ltd
Pages23-33
Number of pages11
ISBN (Print)9783038356721
DOIs
StatePublished - 1 Jan 2016
Event12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015 - Tokyo, Japan
Duration: 6 Sep 201510 Sep 2015

Publication series

NameMaterials Science Forum
Volume838-839
ISSN (Print)0255-5476

Conference

Conference12th International Conference on Superplasticity in Advanced Materials, ICSAM 2015
Country/TerritoryJapan
CityTokyo
Period6/09/1510/09/15

    Research areas

  • Grain boundaries, Severe plastic deformation, Superplasticity, Ultrafine-grained materials

    Scopus subject areas

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

ID: 35171618