Length-scale effects on fracture of multilayers

S. Kumar, D. Zhuo, Douglas Edward Wolfe, J. A. Eades, Md Amanul Haque

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Fracture of Ti/TiN multilayer specimens was studied in situ inside a transmission electron microscope. Fracture toughness for cracks propagating perpendicular to the multilayers is found to be thickness dependent, varying from 1.45 to 2.45 MPa-m 0.5 as the specimen thickness increased from 150 to 300 nm. Single-mode crack renucleation was observed in the metals layers, which is anomalous to the continuum-based elastic-plastic multilayer fracture model predictions. This is explained by the ultrafine columnar grain structure in the metal layers.

Original languageEnglish (US)
Pages (from-to)196-199
Number of pages4
JournalScripta Materialia
Volume63
Issue number2
DOIs
StatePublished - Jul 1 2010

Fingerprint

scale effect
Multilayers
cracks
fracture strength
Metals
metals
Cracks
plastics
electron microscopes
Crystal microstructure
continuums
Fracture toughness
Electron microscopes
predictions
Plastics

All Science Journal Classification (ASJC) codes

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

Cite this

Kumar, S. ; Zhuo, D. ; Wolfe, Douglas Edward ; Eades, J. A. ; Haque, Md Amanul. / Length-scale effects on fracture of multilayers. In: Scripta Materialia. 2010 ; Vol. 63, No. 2. pp. 196-199.
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Length-scale effects on fracture of multilayers. / Kumar, S.; Zhuo, D.; Wolfe, Douglas Edward; Eades, J. A.; Haque, Md Amanul.

In: Scripta Materialia, Vol. 63, No. 2, 01.07.2010, p. 196-199.

Research output: Contribution to journalArticle

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AU - Kumar, S.

AU - Zhuo, D.

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