TY - JOUR
T1 - Constitutive modeling of stress-driven grain growth in nanocrystalline metals
AU - Gürses, Ercan
AU - Wafai, Husam
AU - El Sayed, Tamer S.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was funded by KAUST baseline funds.
PY - 2013/2/8
Y1 - 2013/2/8
N2 - In this work, we present a variational multiscale model for grain growth in face-centered cubic nanocrystalline (nc) metals. In particular, grain-growth-induced stress softening and the resulting relaxation phenomena are addressed. The behavior of the polycrystal is described by a conventional Taylor-type averaging scheme in which the grains are treated as two-phase composites consisting of a grain interior phase and a grain boundary-affected zone. Furthermore, a grain-growth law that captures the experimentally observed characteristics of the grain coarsening phenomena is proposed. To this end, the grain size is not taken as constant and varies according to the proposed stress-driven growth law. Several parametric studies are conducted to emphasize the influence of the grain-growth rule on the overall macroscopic response. Finally, the model is shown to provide a good description of the experimentally observed grain-growth-induced relaxation in nc-copper. © 2013 IOP Publishing Ltd.
AB - In this work, we present a variational multiscale model for grain growth in face-centered cubic nanocrystalline (nc) metals. In particular, grain-growth-induced stress softening and the resulting relaxation phenomena are addressed. The behavior of the polycrystal is described by a conventional Taylor-type averaging scheme in which the grains are treated as two-phase composites consisting of a grain interior phase and a grain boundary-affected zone. Furthermore, a grain-growth law that captures the experimentally observed characteristics of the grain coarsening phenomena is proposed. To this end, the grain size is not taken as constant and varies according to the proposed stress-driven growth law. Several parametric studies are conducted to emphasize the influence of the grain-growth rule on the overall macroscopic response. Finally, the model is shown to provide a good description of the experimentally observed grain-growth-induced relaxation in nc-copper. © 2013 IOP Publishing Ltd.
UR - http://hdl.handle.net/10754/594162
UR - https://iopscience.iop.org/article/10.1088/0965-0393/21/2/025011
UR - http://www.scopus.com/inward/record.url?scp=84874337518&partnerID=8YFLogxK
U2 - 10.1088/0965-0393/21/2/025011
DO - 10.1088/0965-0393/21/2/025011
M3 - Article
SN - 0965-0393
VL - 21
SP - 025011
JO - Modelling and Simulation in Materials Science and Engineering
JF - Modelling and Simulation in Materials Science and Engineering
IS - 2
ER -