TY - JOUR
T1 - Defect based micromechanical modelling and simulation of nanoSPD CP-Ti in post-deformation
AU - Zeipper, L
AU - Zehetbauer, Michael
AU - Holzleithner, Christian
N1 - DOI: 10.1016/j.msea.2005.08.120
Affiliations: Materials and Production Engineering, ARC Seibersdorf Research GmbH, A-2444 Seibersdorf, Austria; Institute of Materials Physics, University of Vienna, A-1090 Wien, Austria; Iron Casting, Georg Fischer Automobilguss AG, A-3130 Herzogenburg, Austria
Adressen: Zehetbauer, M.J.; Institute of Materials Physics; University of Vienna A-1090 Wien, Austria; email: [email protected]
Import aus Scopus: 2-s2.0-28944454564
04.12.2007: Datenanforderung 2001 (Import Sachbearbeiter)
PY - 2005
Y1 - 2005
N2 - The paper concerns the dislocation based modelling and simulation of room temperature post-compression hardening after warm equal channel angular processing (ECAP) of grade 2 CP-Ti. The post-deformation behaviour is well simulated by the Zehetbauer model which already succeeded in describing the evolution of strength and structural parameters during conventional and severe plastic deformation. The model yields excellent fits to the experimental post-compression hardening characteristics (stages II, III and IV) as well as to the evolution of dislocation density. The physical quantities involved in the resulting fit parameters take reasonable values. In particular, the calculations yield a satisfactory agreement with the experimentally gained data of the cell size and the concentration of lattice vacancies, as it is shown by comparisons with X-ray profile investigations and measurements of residual electrical resistivity. As a difference to previous modelling of large strain hardening, edge dislocation density saturates at smaller strains than screw density which seems to be a consequence of the much finer initial grain structure and of the elevated ECAP deformation temperature. Œ 2005 Elsevier B.V. All rights reserved.
AB - The paper concerns the dislocation based modelling and simulation of room temperature post-compression hardening after warm equal channel angular processing (ECAP) of grade 2 CP-Ti. The post-deformation behaviour is well simulated by the Zehetbauer model which already succeeded in describing the evolution of strength and structural parameters during conventional and severe plastic deformation. The model yields excellent fits to the experimental post-compression hardening characteristics (stages II, III and IV) as well as to the evolution of dislocation density. The physical quantities involved in the resulting fit parameters take reasonable values. In particular, the calculations yield a satisfactory agreement with the experimentally gained data of the cell size and the concentration of lattice vacancies, as it is shown by comparisons with X-ray profile investigations and measurements of residual electrical resistivity. As a difference to previous modelling of large strain hardening, edge dislocation density saturates at smaller strains than screw density which seems to be a consequence of the much finer initial grain structure and of the elevated ECAP deformation temperature. Œ 2005 Elsevier B.V. All rights reserved.
U2 - 10.1016/j.msea.2005.08.120
DO - 10.1016/j.msea.2005.08.120
M3 - Article
SN - 0921-5093
VL - 410-411
SP - 217
EP - 221
JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructures and Processing
IS - SI
ER -