Propagation of shear bands and accommodation of shear strain in the Fe 56Nb4Al40 ultrafine eutectic-dendrite composite

Jin Man Park, Sung Woo Sohn, Do Hyang Kim, Ki Buem Kim, Won Tae Kim, Jürgen Eckert

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Microstructural investigations of Fe56 Nb4 Al40 ultrafine eutectic-dendrite composite reveal that its high room temperature plasticity mainly originates from the evolution of slip in the dendrites and multiple shear banding in the ultrafine eutectic matrix, respectively. Here, we sequentially describe that the shear bands in the ultrafine eutectic matrix are propagated with generation of strain field in the soft alpha-Fe(Al) layers rather than passing through by sharp shear banding in the hard (Fe,Al)2 Nb intermetallic layers. Consequently, step morphologies at the interfaces of the alternating lamellae and the dendrite/eutectic matrix strongly support the effective accommodation of shear strain during shear band propagation.

Original languageEnglish
Article number091910
JournalApplied Physics Letters
Volume92
Issue number9
DOIs
Publication statusPublished - 2008 Mar 14

Fingerprint

shear strain
accommodation
dendrites
eutectics
shear
composite materials
propagation
matrices
lamella
plastic properties
intermetallics
slip
room temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Park, Jin Man ; Sohn, Sung Woo ; Kim, Do Hyang ; Kim, Ki Buem ; Kim, Won Tae ; Eckert, Jürgen. / Propagation of shear bands and accommodation of shear strain in the Fe 56Nb4Al40 ultrafine eutectic-dendrite composite. In: Applied Physics Letters. 2008 ; Vol. 92, No. 9.
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Propagation of shear bands and accommodation of shear strain in the Fe 56Nb4Al40 ultrafine eutectic-dendrite composite. / Park, Jin Man; Sohn, Sung Woo; Kim, Do Hyang; Kim, Ki Buem; Kim, Won Tae; Eckert, Jürgen.

In: Applied Physics Letters, Vol. 92, No. 9, 091910, 14.03.2008.

Research output: Contribution to journalArticle

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AB - Microstructural investigations of Fe56 Nb4 Al40 ultrafine eutectic-dendrite composite reveal that its high room temperature plasticity mainly originates from the evolution of slip in the dendrites and multiple shear banding in the ultrafine eutectic matrix, respectively. Here, we sequentially describe that the shear bands in the ultrafine eutectic matrix are propagated with generation of strain field in the soft alpha-Fe(Al) layers rather than passing through by sharp shear banding in the hard (Fe,Al)2 Nb intermetallic layers. Consequently, step morphologies at the interfaces of the alternating lamellae and the dendrite/eutectic matrix strongly support the effective accommodation of shear strain during shear band propagation.

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