Some experimental studies of fatigue slip bands and persistent slip bands during fatigue process of low-carbon steel

摘要: Abstract Initiation and propagation behaviours of fatigue slip bands persistent in lowcarbon steel have been investigated: were expressed quantitatively as a volume fraction which was products the area ( Σ A s 0 ), depth h ) number slipped grains G ). It shown that distributions showed maximum at angle division 0° ~ 10° (at near normal to stress axis) decreased gradually with increasing angle. And normalized increased linearly proportion cycles independently amplitude σa θ. The increment meant damage life until its value reached certain content. Then, initiation rates bands, stage I microcracks tendency σa, propagating from micro-cracks also similar amplitude.