Tensile behavior of bulk nanocrystalline aluminum synthesized by hot extrusion of ball-milled powders

H. J. Choi, S. W. Lee, J. S. Park, D. H. Bae

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The deformation behavior of bulk nanocrystalline aluminum down to 48 nm in grain size, produced by hot extrusion of ball-milled powders, has been evaluated by compression and tension tests. Isotropic yield stress increases following the Hall-Petch relationship with decreasing grain size down to 70 nm. However, a positive deviation in the relationship is found for grain sizes below 70 nm, and aluminum with a grain size of 48 nm exhibits a superior yield stress of 500 MPa with ductile failure.

Original languageEnglish
Pages (from-to)1123-1126
Number of pages4
JournalScripta Materialia
Volume59
Issue number10
DOIs
Publication statusPublished - 2008 Nov 1

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All Science Journal Classification (ASJC) codes

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

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