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Home  >  Journal list  >  Journal of the Society of Materials Science, Japan  >  Vol.65  No.9 (2016)  >  pp.672-678

Journal of the Society of Materials Science, Japan
<<Previous article Vol.65  No.9 (2016)   pp.672 - 678 Next article>>

Study on Giga-Cycle Fatigue Properties and Non-Propagating Fatigue Crack for A5083P-O Aluminum Alloy

Hide-aki NISHIKAWA1), Estuo TAKEUCHI1), Yoshiyuki FURUYA1)
1) National Institute for Materials Science, Materials Reliability Unit

In this study, Giga-cycle fatigue properties for A5083P-O aluminum alloy were investigated by ultrasonic fatigue testing at 20 kHz, rotating bending fatigue testing at 100 Hz and electromagnetic resonance type fatigue testing at 100 Hz. Not only the ultrasonic fatigue testing but also rotating bending fatigue testing were conducted up to 1010 cycles to validate the ultrasonic fatigue testing. The ultrasonic fatigue test results showed negligible difference from those of conventional fatigue testing results. In addition, the slope of S-N curve becomes smaller in 108 ~ 1010 cycles and fatigue limit like behavior was discovered. Furthermore, successive surface observation discovered the phenomena that fatigue crack stopped propagating during 109 cycles fatigue test. It is clarified that non-propagating microscopic fatigue crack develops fatigue limit of A5083P-O aluminum alloy.




Keyword:
Aluminum alloy, Giga-cycle fatigue

Received: December 16, 2015
Published online: September 20, 2016

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