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Wei, D.*; Gong, W.; Tsuru, Tomohito; Lobzenko, I.; Li, X.*; Harjo, S.; Kawasaki, Takuro; Do, H.-S.*; Bae, J. W.*; Wagner, C.*; et al.
International Journal of Plasticity, 159, p.103443_1 - 103443_18, 2022/12
Times Cited Count：3 Percentile：80.2(Engineering, Mechanical)
neutron diffractionWei, D.*; Gong, W.; Tsuru, Tomohito; Kawasaki, Takuro; Harjo, S.; Cai, B.*; Liaw, P. K.*; Kato, Hidemi*
International Journal of Plasticity, 158, p.103417_1 - 103417_17, 2022/11
Times Cited Count：5 Percentile：80.2(Engineering, Mechanical)Zhang, X. X.*; Knoop, D.*; Andr
, H.*; Harjo, S.; Kawasaki, Takuro; Lutz, A.*; Lahres, M.*
International Journal of Plasticity, 140, p.102972_1 - 102972_20, 2021/05
Times Cited Count：16 Percentile：95.34(Engineering, Mechanical)
Nb with the L1
structureOkamoto, Norihiko*; Takemoto, Shohei*; Chen, Z. M. T.*; Yamaguchi, Masatake; Inui, Haruyuki*
International Journal of Plasticity, 97, p.145 - 158, 2017/10
Times Cited Count：8 Percentile：44.7(Engineering, Mechanical)Aoyagi, Yoshiteru*; Tsuru, Tomohito; Shimokawa, Tomotsugu*
International Journal of Plasticity, 55, p.43 - 57, 2014/04
Times Cited Count：37 Percentile：86.95(Engineering, Mechanical)UFGMs with a grain size less than 1 
m exhibits remarkable material and mechanical properties, and a computational model predicting these properties is desired in the field of materials science and engineering. When grains are of the submicron order, dislocation loops are hardly generated from Frank-Read sources smaller than the grain size. In this study, we develop a crystal plasticity model considering the effect of the grain boundary and dislocation source. We thoroughly investigate the effect of dislocation behavior on the material properties of UFGMs.
Aoyagi, Yoshiteru*; Kobayashi, Ryotaro*; Kaji, Yoshiyuki; Shizawa, Kazuyuki*
International Journal of Plasticity, 47, p.13 - 28, 2013/08
Times Cited Count：24 Percentile：72.92(Engineering, Mechanical)In this study, we derive reaction-diffusion equations for dislocation patterning of dislocation cell structures and subgrains. In order to express the generation of dislocation pattern responding to deformation progress, information of slip rate and stress and effect of interactions between slip systems on formation of cell structures are introduced into the reaction rate coefficients of reaction-diffusion equations. Moreover, we propose a multiscale crystal plasticity model based on dislocation patterning. Then we carry out pseudo-three-dimensional FE-FD hybrid simulation for severe compression of FCC polycrystal using the present model. Some processes of ultra fine-graining, i.e., generation of dislocation cell structures, subgrains, dense dislocation walls and lamella subdivisions with high angle boundaries are numerically reproduced, and we investigate the effect of dislocation behavior on the processes of ultrafine-graining.
