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

Research output: Contribution to journalArticle

13 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

Fingerprint

Steel
ductility
phase transformations
Ductility
Phase transitions
steels
Grain refinement
tradeoffs
yield strength
high strength
strain rate
Yield stress
Strain rate
Ultrafine

All Science Journal Classification (ASJC) codes

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

Cite this

Cheng, S., Choo, H., Zhao, Y. H., Wang, X. L., Zhu, Y. T., Wang, Y. D., ... 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
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. / High ductility of ultrafine-grained steel via phase transformation. In: Journal of Materials Research. 2008 ; Vol. 23, No. 6. pp. 1578-1586.
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Cheng, S, Choo, H, Zhao, YH, Wang, XL, Zhu, YT, Wang, YD, Almer, J, Liaw, PK, Jin, JE & Lee, YK 2008, 'High ductility of ultrafine-grained steel via phase transformation', Journal of Materials Research, vol. 23, no. 6, pp. 1578-1586. https://doi.org/10.1557/jmr.2008.0213

High ductility of ultrafine-grained steel via phase transformation. / 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.

In: Journal of Materials Research, Vol. 23, No. 6, 01.06.2008, p. 1578-1586.

Research output: Contribution to journalArticle

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AU - Almer, J.

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AU - Lee, Y. K.

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Cheng S, Choo H, Zhao YH, Wang XL, Zhu YT, Wang YD et al. High ductility of ultrafine-grained steel via phase transformation. Journal of Materials Research. 2008 Jun 1;23(6):1578-1586. https://doi.org/10.1557/jmr.2008.0213