High strength and high uniform ductility in a severely deformed iron alloy by lattice softening and multimodal-structure formation

Kaveh Edalati, Tadahiko Furuta, Takeshi Daio, Shigeru Kuramoto, Zenji Horita

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Despite high strength of nanostructured alloys,they usually exhibit poor uniform ductility. For many applications,it is an important issue to design new nanostructured alloys which have both high strength and high uniform ductility. In this study,an Fe-Ni-Al-C alloy with ultrahigh tensile strength of 1.9-2.2 GPa and high uniform ductility of 16-19% was developed by concurrent employment of several strategies: (i) appropriate choice of chemical compositions for lattice softening,(ii) severe plastic deformation using the high-pressure torsion method for grain refinement,and (iii) control of strain level for multimodal-structure formation composed of equiaxed nanograins,lamellar coarse grains and fine precipitates.

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalMaterials Research Letters
Volume3
Issue number4
DOIs
Publication statusPublished - May 2016

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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