The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses

Jin Man Park, Do Hyang Kim, Mihai Stoica, Norbert Mattern, Ran Li, Jürgen Eckert

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Improved room temperature plasticity was achieved by microalloying Cu in a series of (Fe71Nb6B23)100-xCu x (x = 0, 0.25, 0.5, 0.75, and 1) glass matrix alloys with tunable size and volume fraction of precipitates composed of α-Fe and Fe23B6 phases. When ∼10-nm-sized nano-scale precipitates are formed with a size comparable to the shear bandwidth by controlling the added content of Cu, the (Fe71Nb6B23)99.5Cu0.5 alloy exhibits a maximum plastic strain of 4.3 ± 0.8% with pronounced multiple shear banding. A further increase in the size of the precipitates up to micrometer scale results in catastrophic fracture accompanied with irregular cracks, revealing that the fracture mechanism of the different alloys is controlled by the precipitate size.

Original languageEnglish
Pages (from-to)2080-2086
Number of pages7
JournalJournal of Materials Research
Volume26
Issue number16
DOIs
Publication statusPublished - 2011 Dec 1

Fingerprint

Metallic glass
metallic glasses
plastic properties
Plasticity
Precipitates
precipitates
shear
Microalloying
micrometers
Volume fraction
Plastic deformation
plastics
cracks
Cracks
bandwidth
Bandwidth
Glass
glass
room temperature
matrices

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Man Park, Jin ; Kim, Do Hyang ; Stoica, Mihai ; Mattern, Norbert ; Li, Ran ; Eckert, Jürgen. / The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses. In: Journal of Materials Research. 2011 ; Vol. 26, No. 16. pp. 2080-2086.
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The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses. / Man Park, Jin; Kim, Do Hyang; Stoica, Mihai; Mattern, Norbert; Li, Ran; Eckert, Jürgen.

In: Journal of Materials Research, Vol. 26, No. 16, 01.12.2011, p. 2080-2086.

Research output: Contribution to journalArticle

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T1 - The influence of in situ formed precipitates on the plasticity of Fe-Nb-B-Cu bulk metallic glasses

AU - Man Park, Jin

AU - Kim, Do Hyang

AU - Stoica, Mihai

AU - Mattern, Norbert

AU - Li, Ran

AU - Eckert, Jürgen

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AB - Improved room temperature plasticity was achieved by microalloying Cu in a series of (Fe71Nb6B23)100-xCu x (x = 0, 0.25, 0.5, 0.75, and 1) glass matrix alloys with tunable size and volume fraction of precipitates composed of α-Fe and Fe23B6 phases. When ∼10-nm-sized nano-scale precipitates are formed with a size comparable to the shear bandwidth by controlling the added content of Cu, the (Fe71Nb6B23)99.5Cu0.5 alloy exhibits a maximum plastic strain of 4.3 ± 0.8% with pronounced multiple shear banding. A further increase in the size of the precipitates up to micrometer scale results in catastrophic fracture accompanied with irregular cracks, revealing that the fracture mechanism of the different alloys is controlled by the precipitate size.

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