Crack growth in Fe-2.7 wt% Si single crystals under cyclic loading and 3D atomistic results in bcc iron

0456464 - ÚT 2017 RIV GB eng J - Journal Article
Landa, Michal - Machová, Anna - Uhnáková, Alena - Pokluda, J. - Lejček, Pavel
Crack growth in Fe-2.7 wt% Si single crystals under cyclic loading and 3D atomistic results in bcc iron.
International Journal of Fatigue. Roč. 87, June (2016), s. 63-70. ISSN 0142-1123. E-ISSN 1879-3452
R&D Projects: GA ČR(CZ) GAP108/10/0698; GA ČR GAP108/12/0144; GA ČR(CZ) GA15-20666S; GA ČR GA13-13616S
Institutional support: RVO:61388998 ; RVO:68378271
Keywords : grack growth * cyclic loading * Bcc iron
Subject RIV: JL - Materials Fatigue, Friction Mechanics; BM - Solid Matter Physics ; Magnetism (FZU-D)
Impact factor: 2.899, year: 2016
http://ac.els-cdn.com/S014211231500448X/1-s2.0-S014211231500448X-main.pdf?_tid=96e3e5a0-fb08-11e5-92cb-00000aab0f02&acdnat=1459845181_19fcdd93d31b1f140714e52b835b33d8

To search for correlations between experiments on macro-level and atomistic results on nano-scale,new experimental results from fracture tests under cyclic loading performed at room temperature on bcc iron-silicon single crystals with edge crack ð 110Þ[110] (crack plane/crack front) are presented. The crystals were loaded in mode I with stress ratio R = 0. Crack growth Da under various values of the applied stress intensity DKA and acoustic emission response were monitored simultaneously.Experimental results comply with the basic predictions on fatigue crack growth following from continuum modeling and with molecular dynamic (MD) simulations in bcc iron. MD and experimental results can be described by very similar values of the Paris exponents although different length scales are treated in the two methods.
Permanent Link: http://hdl.handle.net/11104/0258644