Rate-dependent serrated flow and plastic deformation in Ti 45Zr16Be20Cu10Ni9 bulk amorphous alloy during nanoindentation

Dinesh Kumar Misra, Sung Woo Sohn, Won Tae Kim, Do Hyang Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The plastic deformation of Ti45Zr16Be 20Cu10Ni9 bulk metallic glass has been investigated by nanoindentation performed with loads ranging from 10 to 200 mN in a wide range of loading rates. The plastic flow in the alloy exhibited conspicuous serrations at low loading rates. The serrations, however, became less prominent as the rate of indentation increased. Atomic force microscopy showed a significant pile-up of materials around the indents, indicating that a highly localized plastic deformation occurred under nanoindentation. The possible mechanism governing the plastic deformation in bulk metallic glass specimens is tentatively discussed in terms of strain-induced free volume.

Original languageEnglish
Article number045004
JournalScience and Technology of Advanced Materials
Volume9
Issue number4
DOIs
Publication statusPublished - 2008 Dec 1

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Amorphous alloys
Nanoindentation
Plastic deformation
Metallic glass
Free volume
Plastic flow
Indentation
Piles
Atomic force microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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abstract = "The plastic deformation of Ti45Zr16Be 20Cu10Ni9 bulk metallic glass has been investigated by nanoindentation performed with loads ranging from 10 to 200 mN in a wide range of loading rates. The plastic flow in the alloy exhibited conspicuous serrations at low loading rates. The serrations, however, became less prominent as the rate of indentation increased. Atomic force microscopy showed a significant pile-up of materials around the indents, indicating that a highly localized plastic deformation occurred under nanoindentation. The possible mechanism governing the plastic deformation in bulk metallic glass specimens is tentatively discussed in terms of strain-induced free volume.",
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Rate-dependent serrated flow and plastic deformation in Ti 45Zr16Be20Cu10Ni9 bulk amorphous alloy during nanoindentation. / Misra, Dinesh Kumar; Sohn, Sung Woo; Kim, Won Tae; Kim, Do Hyang.

In: Science and Technology of Advanced Materials, Vol. 9, No. 4, 045004, 01.12.2008.

Research output: Contribution to journalArticle

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