Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 29-30, Pages 7689-7693Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.08.044
Keywords
Titanium; Porosity; Open foam; Fracture toughness; Mechanical properties
Categories
Funding
- Australian Research Council [DP0770021]
- ARNAM
- Australian Research Council [DP0770021] Funding Source: Australian Research Council
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The fracture behavior of titanium open foam is characterized and the R-curves of crack propagation from pre-cracks are measured. The crack growth has been optically observed, the measured initiation toughness, J(IC), has been analyzed and the effect of material morphology on the J(lC) is discussed. The fracture toughness was found to be dependent on the expanding crack bridging zone at the back of the crack tip. The compact tension specimens also have some plastic collapse along the ligaments and it has shown that the titanium foam with a higher relative density is tougher. The non-uniform stressing within the plastic zone at the crack tip and the plastic collapse of cell topology behind the tip was found to be the primary cause of the R-curve behavior in low relative density titanium foams. (C) 2010 Elsevier B.V. All rights reserved.
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