Modeling and Simulations of Experimentally-Observed Dislocation Substructures Based on Field Theory of Multiscale Plasticity (FTMP) Combined with TEM and EBSD-Wilkinson Method for FCC and BCC Poly/Single Crystals

被引：10

作者：

Hasebe, T. ^{[1
]}

Sugiyama, M. ^{[2
]}

Adachi, H. ^{[3
]}

Fukutani, S. ^{[4
]}

Iida, M. ^{[4
]}

机构：

[1] Kobe Univ, Dept Mech Engn, Kobe, Hyogo 6578501, Japan

[2] Nippon Steel & Simitomo Met Corp, Adv Technol Res Labs, Futtsu 2938511, Japan

[3] Kagoshima Univ, Dept Mech Engn, Kagoshima 8908580, Japan

[4] Kobe Univ, Grad Sch Engn, Kobe, Hyogo 6578501, Japan

来源：

MATERIALS TRANSACTIONS | 2014年 / 55卷 / 05期

关键词：

multiscale plasticity; crystal plasticity; dislocation substructure; transmission electron microscopy (TEM); electron backscatter diffraction (EBSD)-Wilkinson method; field theory;

D O I：

10.2320/matertrans.M2013226

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An attempt is made here to reproduce the experimentally-observed inhomogeneous deformation structures based on FTMP (Field Theory of Multiscale Plasticity), where TEM observations for sheared single crystal samples with four typical crystallographic orientations as well as an EBSD-Wilkinson method-based result for a polycrystal are taken as recent successful examples, ultimately aiming at developing a new technique for in situ/ex situ local-global inhomogeneity evaluation during elasto-plastic deformation combined with these experimental techniques. Crystal plasticity-based finite element simulations utilizing FTMP-based incompatibility model are conducted in connection with a working hypothesis called flow-evolutionary law, whose manifestation is given as a relationship between the incompatibility tensor and the energy-momentum tensor (duality diagram). Demonstrated are not only successful reproductions of the orientation-dependent dislocation substructures and the intra-granularly evolved deformation structures, but also the associated energy flow with the evolved inhomogeneities visualized on the corresponding duality diagram.

引用

页码：779 / 787

页数：9