Journals / Turkish Journal of Engineering and Environmental Sciences / 2002 / Cilt: 26 - Sayı: 3
Low Cycle Fatigue Properties of 2124/SiCp Al-Alloy Composites
- Pages
- 265–274
- DOI
- —
Abstract
In this article, powder metallurgy processed metal matrix composites are tested under the strain control loading conditions. The influence of volume fraction (17 and 25 vol%), particulate size (2.5 and 15 m m) of reinforcement particles and strain ratio (R=0, R=0.5 and R= -1) are examined for 2124 Al-alloy-T4 composites. Increasing the content of SiCp results in the degradation of strain control fatigue properties. The monotonic and cyclic stress-strain response of the 2124Al -- (25 vol % 2.5 m m) SiCp composite was significantly altered by strain ratio values.Fatigue cracks frequently initiated from intensively stress concentrated regions. Increasing volume fraction and particle sizes result in early crack initiation.
Özet
In this article, powder metallurgy processed metal matrix composites are tested under the strain control loading conditions. The influence of volume fraction (17 and 25 vol%), particulate size (2.5 and 15 m m) of reinforcement particles and strain ratio (R=0, R=0.5 and R= -1) are examined for 2124 Al-alloy-T4 composites. Increasing the content of SiCp results in the degradation of strain control fatigue properties. The monotonic and cyclic stress-strain response of the 2124Al -- (25 vol % 2.5 m m) SiCp composite was significantly altered by strain ratio values.Fatigue cracks frequently initiated from intensively stress concentrated regions. Increasing volume fraction and particle sizes result in early crack initiation.