THE EFFECTIVE THRESHOLD OF FATIGUE-CRACK PROPAGATION IN ALUMINUM-ALLOYS II - THE INFLUENCE OF PARTICLE REINFORCEMENT

Authors
PIPPAN R WEINERT P
Citation
R. Pippan et P. Weinert, THE EFFECTIVE THRESHOLD OF FATIGUE-CRACK PROPAGATION IN ALUMINUM-ALLOYS II - THE INFLUENCE OF PARTICLE REINFORCEMENT, Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties, 77(4), 1998, pp. 875-886
Citations number
27
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter","Metallurgy & Metallurigical Engineering
Journal title
Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties → ACNP
ISSN journal
13642804
Volume
77
Issue
4
Year of publication
1998
Pages
875 - 886
Database
ISI
SICI code
1364-2804(1998)77:4<875:TETOFP>2.0.ZU;2-3
Abstract
The threshold of effective stress intensity range Delta K-eff th of al uminium alloy 6061 and a 16 vol.% and a 21 vol.% Al2O3-particle-reinfo rced aluminium alloy was investigated. In the near-threshold regime th e fatigue crack propagates predominately in the aluminium matrix, but the effective threshold Delta K-eff th increases with increasing parti cle content. The main reason for this increase in Delta K-eff th is th e reduction in the local crack driving force at the crack tip in the a luminium matrix due to increase in Young's modulus of the surrounding composite.