Development of ultrahigh strength and high ductility in nanostructured iron alloys with lattice softening and nanotwins

Kaveh Edalati, Shoichi Toh, Tadahiko Furuta, Shigeru Kuramoto, Masashi Watanabe, Zenji Horita

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Bulk nanostructured materials exhibit high strength but very low ductility. In this study, ductile nanostructured iron-base alloys are successfully developed using a combination of three strategies: appropriate choice of chemical compositions for lattice softening, severe plastic deformation using high-pressure torsion for grain refinement, and annealing for nanotwin formation. Accordingly, exceptional performance of both ultrahigh strength, 2.3-3 GPa, and high elongation to failure, 10-20%, which has never been reported for metallic materials, is achieved.

Original languageEnglish
Pages (from-to)511-514
Number of pages4
JournalScripta Materialia
Volume67
Issue number5
DOIs
Publication statusPublished - Sep 1 2012

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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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