AFM and FIB study of cyclic strain localization and surface relief evolution in fatigued f.c.c. polycrystals

0435448 - ÚFM 2015 RIV CH eng C - Conference Paper (international conference)
Man, Jiří - Valtr, M. - Kuběna, Ivo - Petrenec, M. - Obrtlík, Karel - Polák, Jaroslav
AFM and FIB study of cyclic strain localization and surface relief evolution in fatigued f.c.c. polycrystals.
11th International Fatigue Congress. Zurich: Trans Tech Publications, 2014 - (Clark, G.; Wang, C.), s. 524-529. Advanced Materials Research, 891-892. ISBN 978-3-03835-008-8. ISSN 1022-6680.
[Fatigue 2014 - International Fatigue Congress /11./. Melbourne (AU), 02.03.2014-07.03.2014]
R&D Projects: GA ČR(CZ) GAP108/10/2371; GA ČR GA13-32665S
Institutional support: RVO:68081723
Keywords : fatigue crack initiation * 316L austenitic steel * polycrystalline copper * atomic force microscopy (AFM) * focused ion beam (FIB) * persistent slip band (PSB) * extrusion * intrusion
Subject RIV: JL - Materials Fatigue, Friction Mechanics

Atomic force microscopy (AFM) and focused ion beam technique (FIB) were adopted to study the early stages of surface relief evolution in 316L steel and polycrystalline copper fatigued with constant plastic strain amplitudes at different temperatures (316L steel at 93, 173 and 573 K; copper at 83, 173 and 295 K). Qualitative and quantitative data on the morphology and shape of persistent slip markings (PSMs), occurrence of extrusions and intrusions and the kinetics of extrusion growth are reported. They are discussed in relation with recent physically based theories of surface relief formation leading to fatigue crack initiation.
Permanent Link: http://hdl.handle.net/11104/0239315