National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Quantitative assessment of the surface relief in fatigue using AFM
Man, Jiří ; Obrtlík, Karel ; Polák, Jaroslav
Atomic force microscopy (AFM) was applied to study the early stages of fatigue damage in polycrystalline copper and stainless 316L steel. The analysis of the image formation using an AFM tip reveals the lateral distortion of the extrusions and intrusions in case of high extrusions and deep intrusions. The true extrusion height can be obtained in direct observation and the depth of intrusions using replica technique. The evolution of the shape and the height of extrusions allowed to judge the activity of the persistent slip bands (PSBs) during fatigue life.
Effect oc surface carburizing on low cycle fatigue of 316L austenitic stainless steel
Obrtlík, Karel ; Polák, Jaroslav
Both surface carburized and untreated 316L stainless steel specimens were cyclically loaded with constant plastic strain amplitude. Characteristics of stress strain response and fatigue life were evaluated and surface relief evolution and crack initiation was studied.

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