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MAN, J. VYSTAVĚL, T. WEIDNER, A. KUBĚNA, I. PETRENEC, M. KRUML, T. POLÁK, J.
Original Title
Study of cyclic strain localization and fatigue crack initiation using FIB technique
Type
journal article - other
Language
English
Original Abstract
Focused ion beam (FIB) technique together with other advanced microscopic techniques was applied to study the early microstructural changes leading to fatigue crack initiation in cyclically strained polycrystals (nickel, 316L steel). Dislocation structures of persistent slip bands (PSBs) and surrounding matrix were investigated in detail using electron channeling contrast imaging (ECCI) technique (concurrently in the FIB cross-section and on the specimen surface) and simultaneously with the surface relief topography using transmission electron microscopy (TEM) of thin surface foils prepared by in situ lift-out technique. True shape of extrusions and intrusions and the path of initiated fatigue cracks were assessed in three dimensions by FIB micro-tomography. The role of twin boundary in cyclic strain localization and fatigue crack initiation is discussed. Principal advantages and some limitations of FIB technique in fatigue crack initiation studies in polycrystals are highlighted.
Keywords
Fatigue crack initiation, Persistent slip band (PSB), Extrusion, Intrusion, Nickel Austenitic steel, Focused ion beam (FIB)
Authors
MAN, J.; VYSTAVĚL, T.; WEIDNER, A.; KUBĚNA, I.; PETRENEC, M.; KRUML, T.; POLÁK, J.
RIV year
2012
Released
1. 2. 2012
ISBN
0142-1123
Periodical
INTERNATIONAL JOURNAL OF FATIGUE
Year of study
39
Number
1
State
United Kingdom of Great Britain and Northern Ireland
Pages from
44
Pages to
53
Pages count
8
BibTex
@article{BUT72578, author="Jiří {Man} and Tomáš {Vystavěl} and Anja {Weidner} and Ivo {Kuběna} and Martin {Petrenec} and Tomáš {Kruml} and Jaroslav {Polák}", title="Study of cyclic strain localization and fatigue crack initiation using FIB technique", journal="INTERNATIONAL JOURNAL OF FATIGUE", year="2012", volume="39", number="1", pages="44--53", issn="0142-1123" }