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The document investigates the fatigue limit of a 6061-T6 aluminum alloy under very high cycle fatigue (over 109 cycles) using an ultrasonic fatigue method. Two types of specimens were tested - smooth specimens and specimens with a small artificial hole. The smooth specimens did not show a distinct fatigue limit, while the holed specimens did show a clear fatigue limit. Detailed metallographic analysis was conducted to understand the micro-plasticity associated with fatigue crack growth and how it relates to

Author

Đạt Nguyễn

Language

EN