| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1500468 | Scripta Materialia | 2010 | 4 Pages |
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-m0.5 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.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
S. Kumar, D. Zhuo, D.E. Wolfe, J.A. Eades, M.A. Haque,