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.
Original language | English (US) |
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Pages (from-to) | 196-199 |
Number of pages | 4 |
Journal | Scripta Materialia |
Volume | 63 |
Issue number | 2 |
DOIs | |
State | Published - Jul 2010 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys