Journal
METALS AND MATERIALS INTERNATIONAL
Volume 17, Issue 3, Pages 397-402Publisher
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-011-0615-0
Keywords
alloys; extrusion; fatigue; crack closure; vacuum
Funding
- Ministry of Knowledge Economy through the Research Institute of Advanced Materials [10555]
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The fatigue crack propagation (FCP) behavior of extruded AZ31-F was examined in conjunction with crack closure phenomena. FCP experiments were carried out in an ultra-high vacuum system using a fatigue test machine under a constant load amplitude. To determine the effect of crack closure on the FCP rates, the crack closure levels were measured using the compliance method. The delta K-th values of the AZ31-F decreased with increasing load ratio. It was found that Delta K-eff,K-th showed an almost constant value regardless of the load ratio.
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