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POLÁK, J. PETRÁŠ, R. CHAI, G. ŠKORÍK, V.
Original Title
Surface profile evolution and fatigue crack initiation in Sanicro 25 steel at room temperature
Type
journal article in Web of Science
Language
English
Original Abstract
Evolution of the surface profile in room temperature cyclic loading has been studied in high alloy austenitic Sanicro 25 stainless steel. The localization of the cyclic plastic strain into persistent slip bands in the volume of the material leads to the formation of the specific surface relief in the form of persistent slip markings (PSMs) consisting of extrusions and intrusions. Evolution of the shape of PSMs was studied during interruption of cycling using SEM and FIB techniques. Three-dimensional information about the PSMs profiles was obtained. The profiles of both extrusions and intrusions and their evolution during cyclic loading were assessed. Generally extrusions grow, intrusions deepen and fatigue cracks initiate from the tip of the deepest intrusions. The experimental observations were compared and discussed in relation to existing physical models of surface relief formation and fatigue crack initiation.
Keywords
Sanicro 25steel, Fatigue crack initiation, Persistent slip markings, Extrusions, Intrusions
Authors
POLÁK, J.; PETRÁŠ, R.; CHAI, G.; ŠKORÍK, V.
Released
21. 3. 2016
ISBN
0921-5093
Periodical
Materials Science and Engineering A
Number
658
State
Swiss Confederation
Pages from
221
Pages to
228
Pages count
8
BibTex
@article{BUT129903, author="Jaroslav {Polák} and Roman {Petráš} and Guocai {Chai} and Viktor {Škorík}", title="Surface profile evolution and fatigue crack initiation in Sanicro 25 steel at room temperature", journal="Materials Science and Engineering A", year="2016", number="658", pages="221--228", doi="10.1016/j.msea.2016.02.016", issn="0921-5093" }