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- Title
Micronotches for studying growth of small cracks.
- Authors
Wessel, W.; Mildner, J.; Pitz, P.; Brueckner‐Foit, A.; Wollenhaupt, M.; Baumert, T.
- Abstract
Well-defined starter cracks at preselected sites in the microstructures are needed for systematic investigation of the characteristic features of microstructure controlled growth of small cracks. A kinked ellipsoidal micronotch with very high notch factor at the trailing kink is proposed, which triggers controlled crack initiation along the notch contour. These micronotches can be machined by femtosecond laser ablation with virtually no heat-affected zone at the edges. Crack growth results obtained for an intermetallic γ-TiAl alloy are presented as an illustrative example.
- Subjects
LAME'S functions; TRIGGER circuits; FEMTOSECOND lasers; ABLATION (Aerothermodynamics); ALLOYS
- Publication
Fatigue & Fracture of Engineering Materials & Structures, 2015, Vol 38, Issue 6, p673
- ISSN
8756-758X
- Publication type
Article
- DOI
10.1111/ffe.12275