High strength Ni-Zr binary ultrafine eutectic-dendrite composite with large plastic deformability

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

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

A Ni-8Zr high strength ultrafine eutectic-dendrite composite with large plasticity has been developed in the Ni-Zr binary eutectic system. The excellent mechanical properties are attributed to the specific heterogeneous microstructure with distinctly different length scales, i.e., micrometer-size ductile dendrites combined with an ultrafine eutectic matrix. The plastic deformation mainly proceeds through a shear banding mechanism. However, there is no significant shear localization due to the constraint effect of ductile solid solution Ni phases including dendrites and/or alternating lamellar layers. Furthermore, excessive shear stress and accumulated shear strain can be effectively released and accommodated by delocalization and multiplication of shear bands.

Original languageEnglish
Article number031913
JournalApplied Physics Letters
Volume93
Issue number3
DOIs
Publication statusPublished - 2008 Aug 4

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dendrites
high strength
eutectics
plastics
shear
composite materials
shear strain
multiplication
plastic properties
shear stress
plastic deformation
micrometers
solid solutions
mechanical properties
microstructure
matrices

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Park, Jin Man ; Kim, Tae Eung ; Sohn, Sung Woo ; Kim, Do Hyang ; Kim, Ki Buem ; Kim, Won Tae ; Eckert, Jürgen. / High strength Ni-Zr binary ultrafine eutectic-dendrite composite with large plastic deformability. In: Applied Physics Letters. 2008 ; Vol. 93, No. 3.
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High strength Ni-Zr binary ultrafine eutectic-dendrite composite with large plastic deformability. / Park, Jin Man; Kim, Tae Eung; Sohn, Sung Woo; Kim, Do Hyang; Kim, Ki Buem; Kim, Won Tae; Eckert, Jürgen.

In: Applied Physics Letters, Vol. 93, No. 3, 031913, 04.08.2008.

Research output: Contribution to journalArticle

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AB - A Ni-8Zr high strength ultrafine eutectic-dendrite composite with large plasticity has been developed in the Ni-Zr binary eutectic system. The excellent mechanical properties are attributed to the specific heterogeneous microstructure with distinctly different length scales, i.e., micrometer-size ductile dendrites combined with an ultrafine eutectic matrix. The plastic deformation mainly proceeds through a shear banding mechanism. However, there is no significant shear localization due to the constraint effect of ductile solid solution Ni phases including dendrites and/or alternating lamellar layers. Furthermore, excessive shear stress and accumulated shear strain can be effectively released and accommodated by delocalization and multiplication of shear bands.

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