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

doi:10.1063/1.2892038

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

59 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 language	English
Article number	091910
Journal	Applied Physics Letters
Volume	92
Issue number	9
DOIs	https://doi.org/10.1063/1.2892038
Publication status	Published - 2008

Bibliographical note

Funding Information:
The authors are grateful to K. T. Kim, J. H. Na, T. E. Kim, E. Fleury, and M. H. Lee for valuable discussions. This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology. J. M. Park and S. W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2007.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.2892038

Cite this

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

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.",

author = "Park, {Jin Man} and Sohn, {Sung Woo} and Kim, {Do Hyang} and Kim, {Ki Buem} and Kim, {Won Tae} and J{\"u}rgen Eckert",

note = "Funding Information: The authors are grateful to K. T. Kim, J. H. Na, T. E. Kim, E. Fleury, and M. H. Lee for valuable discussions. This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology. J. M. Park and S. W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2007. ",

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AU - Park, Jin Man

AU - Sohn, Sung Woo

AU - Kim, Do Hyang

AU - Kim, Ki Buem

AU - Kim, Won Tae

AU - Eckert, Jürgen

N1 - Funding Information: The authors are grateful to K. T. Kim, J. H. Na, T. E. Kim, E. Fleury, and M. H. Lee for valuable discussions. This work was supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology. J. M. Park and S. W. Sohn acknowledge the support from the Second Stage of Brain Korea 21 Project in 2007.

PY - 2008

Y1 - 2008

N2 - 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.

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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