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

51 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

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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