Transformation-induced plasticity in an ultrafine-grained steel

An in situ neutron diffraction study

Kaixiang Tao, Hahn Choo, Hongqi Li, Bjørn Clausen, Jae Eun Jin, Young Kook Lee

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

An ultrafine-grained steel with an average grain size of about 350 nm was developed. The tensile testing at ambient temperature shows a threefold increase in the yield strength compared to its coarse-grained counterpart. Moreover, the increase in the strength was achieved without the sacrifice of the ductility due to strain-induced martensitic transformation. The evolution of lattice strains and phase fractions of the austenite and martensite phases during the deformation was investigated using in situ neutron diffraction to provide a micromechanical understanding of the transformation-induced plasticity responsible for the combination of high strength and ductility.

Original languageEnglish
Article number101911
JournalApplied Physics Letters
Volume90
Issue number10
DOIs
Publication statusPublished - 2007 Mar 16

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ductility
plastic properties
neutron diffraction
steels
martensitic transformation
yield strength
austenite
high strength
martensite
ambient temperature
grain size

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Tao, Kaixiang ; Choo, Hahn ; Li, Hongqi ; Clausen, Bjørn ; Jin, Jae Eun ; Lee, Young Kook. / Transformation-induced plasticity in an ultrafine-grained steel : An in situ neutron diffraction study. In: Applied Physics Letters. 2007 ; Vol. 90, No. 10.
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Transformation-induced plasticity in an ultrafine-grained steel : An in situ neutron diffraction study. / Tao, Kaixiang; Choo, Hahn; Li, Hongqi; Clausen, Bjørn; Jin, Jae Eun; Lee, Young Kook.

In: Applied Physics Letters, Vol. 90, No. 10, 101911, 16.03.2007.

Research output: Contribution to journalArticle

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