Superplasticity in a lean Fe-Mn-Al steel

Jeongho Han, Seok Hyeon Kang, Seung Joon Lee, Megumi Kawasaki, Han Joo Lee, Dirk Ponge, Dierk Raabe, Young Kook Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Superplastic alloys exhibit extremely high ductility (>300%) without cracks when tensile-strained at temperatures above half of their melting point. Superplasticity, which resembles the flow behavior of honey, is caused by grain boundary sliding in metals. Although several non-ferrous and ferrous superplastic alloys are reported, their practical applications are limited due to high material cost, low strength after forming, high deformation temperature, and complicated fabrication process. Here we introduce a new compositionally lean (Fe-6.6Mn-2.3Al, wt.%) superplastic medium Mn steel that resolves these limitations. The medium Mn steel is characterized by ultrafine grains, low material costs, simple fabrication, i.e., conventional hot and cold rolling, low deformation temperature (ca. 650 °C) and superior ductility above 1300% at 850 °C. We suggest that this ultrafine-grained medium Mn steel may accelerate the commercialization of superplastic ferrous alloys.

Original languageEnglish
Article number751
JournalNature communications
Volume8
Issue number1
DOIs
Publication statusPublished - 2017 Dec 1

Fingerprint

superplasticity
Superplasticity
Steel
steels
ductility
Temperature
Ductility
Costs and Cost Analysis
Fabrication
Grain boundary sliding
fabrication
cold rolling
commercialization
Honey
Iron alloys
Hot rolling
Cold rolling
Freezing
melting points
temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Han, J., Kang, S. H., Lee, S. J., Kawasaki, M., Lee, H. J., Ponge, D., ... Lee, Y. K. (2017). Superplasticity in a lean Fe-Mn-Al steel. Nature communications, 8(1), [751]. https://doi.org/10.1038/s41467-017-00814-y
Han, Jeongho ; Kang, Seok Hyeon ; Lee, Seung Joon ; Kawasaki, Megumi ; Lee, Han Joo ; Ponge, Dirk ; Raabe, Dierk ; Lee, Young Kook. / Superplasticity in a lean Fe-Mn-Al steel. In: Nature communications. 2017 ; Vol. 8, No. 1.
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Han, J, Kang, SH, Lee, SJ, Kawasaki, M, Lee, HJ, Ponge, D, Raabe, D & Lee, YK 2017, 'Superplasticity in a lean Fe-Mn-Al steel', Nature communications, vol. 8, no. 1, 751. https://doi.org/10.1038/s41467-017-00814-y

Superplasticity in a lean Fe-Mn-Al steel. / Han, Jeongho; Kang, Seok Hyeon; Lee, Seung Joon; Kawasaki, Megumi; Lee, Han Joo; Ponge, Dirk; Raabe, Dierk; Lee, Young Kook.

In: Nature communications, Vol. 8, No. 1, 751, 01.12.2017.

Research output: Contribution to journalArticle

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AU - Han, Jeongho

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AU - Raabe, Dierk

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Han J, Kang SH, Lee SJ, Kawasaki M, Lee HJ, Ponge D et al. Superplasticity in a lean Fe-Mn-Al steel. Nature communications. 2017 Dec 1;8(1). 751. https://doi.org/10.1038/s41467-017-00814-y