High ductility of ultrafine-grained steel via phase transformation

S. Cheng, H. Choo, Y. H. Zhao, X. L. Wang, Y. T. Zhu, Y. D. Wang, J. Almer, P. K. Liaw, J. E. Jin, Y. K. Lee

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14 Citations (Scopus)

Abstract

There is often a tradeoff between strength and ductility, and the low ductility of ultrafine-grained (UFG) materials has been a major obstacle to their practical structural applications despite their high strength. In this study, we have achieved a ∼40% tensile ductility while increasing the yield strength of FeCrNiMn steel by an order of magnitude via grain refinement and deformation-induced martensitic phase transformation. The strain-rate effect on the inhomogeneous deformation behavior and phase transformation was studied in detail.

Original languageEnglish
Pages (from-to)1578-1586
Number of pages9
JournalJournal of Materials Research
Volume23
Issue number6
DOIs
Publication statusPublished - 2008 Jun 1

All Science Journal Classification (ASJC) codes

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

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    Cheng, S., Choo, H., Zhao, Y. H., Wang, X. L., Zhu, Y. T., Wang, Y. D., Almer, J., Liaw, P. K., Jin, J. E., & Lee, Y. K. (2008). High ductility of ultrafine-grained steel via phase transformation. Journal of Materials Research, 23(6), 1578-1586. https://doi.org/10.1557/jmr.2008.0213