AFM Study Of Slip Localization And Surface Relief Evolution In Fatigued
Ferritic X10CrAl24 Stainless Steel
Author(s)
J. Man, J. Polák, M. Vičar, K. Obrtlík, J. Matějková & A. Rek
Abstract
AFM study of slip localization and surface
relief evolution in fatigued ferritic XlOCrA124
stainless steel
J. an', J. polikl, M. vicar2, K. Obrtlikl, J. ~ a t ~ j k o v a ~ & A. ~ e k ~
1 Institute of Physics of Materials, Brno, Czech Republic
2 Czech Metrology Institute, Brno, Czech Republic
3 Institute of Scientific Instruments, Brno, Czech Republic
Abstract
Atomic force microscopy (AFM) was applied to study the surface relief evolution
at the emerging persistent slip bands (PSBs) in individual grains of
polycrystalline ferritic stainless steel cycled with constant plastic strain
amplitude. The surface relief starts to develop early in the fatigue life (at 0.2-
0.5% Nf) due to the localization of the cyclic plastic strain into PSBs. The
appearance of the first persistent slip markings (PSMs) correlates with the cyclic
hardeninglsoftening curve and with the characteristic variations in the loop shape
parameter VH. Surface relief of the well-developed individual PSMs consists of
extrusions wit
Keywords
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