Surface relief formation in relation to the underlying dislocation arrangement

0465413 - ÚFM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Mazánová, Veronika - Heczko, Milan - Kuběna, Ivo - Polák, Jaroslav
Surface relief formation in relation to the underlying dislocation arrangement.
Materials Structure & Micromechanics of Fracture VIII. Zürrich: Trans Tech Publications, 2017 - (Šandera, P.), s. 526-529. Solid State Phenomena, 258. ISBN 978-3-03835-626-4. ISSN 1662-9779.
[MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./. Brno (CZ), 27.06.2016-29.06.2016]
Grant CEP: GA MŠMT LM2015069; GA MŠMT(CZ) LQ1601; GA ČR GA15-08826S; GA ČR(CZ) GA13-23652S
Institucionální podpora: RVO:68081723
Klíčová slova: dislocation structure * fatigue crack initiation * extrusion * intrusion * copper * austenitic steel
Obor OECD: Audio engineering, reliability analysis

Two fatigued materials with f.c.c. lattice, i.e. pure polycrystalline copper and austenitic Sanicro 25 stainless steel, were subjected to the study of the persistent slip markings (PSMs) developed on the surface of the suitably oriented grains. They were observed using scanning electron microscopy (SEM) and thin surface FIB lamellae were prepared and studied by transmission electron microscopy (TEM). The aim was to correlate the specimen surface profile with the underlying internal dislocation structure. The localization of the intensive cyclic slip into persistent slip bands (PSBs) of the material was observed and associated with the PSMs on the specimen surface. Extrusions, intrusions and the dislocation structure appertaining to them were analysed, documented and discussed in relation to the models of fatigue crack initiation.
Trvalý link: http://hdl.handle.net/11104/0271175