0347197 20240103193839.620101101235959.9 000280468300012 11 s. cav_un_epca*00844801606-5131251 (2010)88-98 High-pressure torsion intergranular glide homogeneous deformation mode cav_un_auth*0044342 Kratochvíl J. CZ cav_un_auth*0101142 Kružík Martin Matematická teorie rozhodování Department of Decision Making Theory MTR MTR UTIA-B Department of Decision Making Theory Ústav teorie informace a automatizace AV ČR, v. v. i. cav_un_auth*0258411 Sedláček R. DE http://library.utia.cas.cz/separaty/2010/MTR/kruzik-model of structural fragmentation induced by high pressure torsion.pdf CEZ:AV0Z10750506 The paper analyzes mechanisms of ultra-fine grain substructure formation as observed in high pressure torsion (HPT) experiments. Accepting that HPT shearing is achieved by intergranular glide (M. Hafok and R. Pippan, Scripta Materialia, 56:757-760, 2007) the fragmentation process is interpreted within the framework of crystal plasticity. The deformation is treated as a plastic flow though the adjustable crystal lattice fragmented into misoriented regions. The basic feature of the substructure formation is an effective rotation of the slip systems approaching asymptotically the observed steady state. The fragmentation is interpreted as an instability of the homogeneous deformation mode. It is proposed that the rotation causes a continuous reconstruction of the substructure pattern. The hindered destruction of the previous pattern leads to enhanced hardening. 2011 BM 3 http://hdl.handle.net/11104/0188029 MATERIALSSCIENCEMULTIDISCIPLINARY|NANOSCIENCENANOTECHNOLOGY 0.920 0.086 5.4 0.00264 0.302 666 93 0.456 Q2 11.897 19.297 Q4 Q2 2010 000280468300012 WOS cav_un_epca*0084480 Reviews on Advanced Materials Science 1606-5131 1605-8127 Roč. 25 č. 1 2010 88 98