Suscripción a Biblioteca: Guest
Portal Digitalde Biblioteca Digital eLibros Revistas Referencias y Libros de Ponencias Colecciones
International Journal for Multiscale Computational Engineering
Factor de Impacto: 1.016 Factor de Impacto de 5 años: 1.194 SJR: 0.554 SNIP: 0.68 CiteScore™: 1.18

ISSN Imprimir: 1543-1649
ISSN En Línea: 1940-4352

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.v4.i4.30
pages 445-460

Effects of Shape and Size of Crystal Grains on the Strengths of Polycrystalline Metals

Kenjiro Terada
Department of civil Engineering, Tohoku University, Sendai 980-8579, Japan
Ikumu Watanabe
Department of Civil Engineering, Tohoku University, Aza-Aoba 6-6-06, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
Masayoshi Akiyama
Corporate R&D Laboratories, Sumitomo Metal Industries Ltd., Fuso-cho 1-8, Amagasaki, Hyogo 660-0891, Japan

SINOPSIS

We investigate the effects of shape and size of crystal grains on the yielding behavior of polycrystalline metals by applying the two-scale finite element method, which is based on the homogenization theory combined with the constitutive models in crystal plasticity. After introducing the formulation of crystal-plasticity-based two-scale modeling, we characterize the mechanical behavior of a single crystal grain. Then, we first examine the effect of grain shape on macroscopic strengths by carrying out numerical experiments on several patterns of grain shapes and inhomogeneities of grain size distribution. Next, we explore the dependency of the various macroscopic strengths on the grain size, which are evaluated as the average behavior of aggregate representative volume elements (RVEs) or microstructures. We are here concerned with the empirical Hall-Petch relationship and intend to assess its possible sources for it apart from intergranular deformations.


Articles with similar content:

ROLE OF TRIBOELASTICITY IN CYCLIC BEHAVIOR OF ELASTOMERIC NANOCOMPOSITES
Composites: Mechanics, Computations, Applications: An International Journal, Vol.1, 2010, issue 1
S. E. Evlampieva, V. V. Moshev
Homogenization Method Based on Eigenvector Expansions
International Journal for Multiscale Computational Engineering, Vol.4, 2006, issue 1
Dechao Zhu, Wenjian Xie, Jinmei Tian
Size of a Representative Volume Element in a Second-Order Computational Homogenization Framework
International Journal for Multiscale Computational Engineering, Vol.2, 2004, issue 4
Marc Geers, W. A. M. Brekelmans, Varvara G. Kouznetsova
COMPUTATIONAL MODELS OF POLYCRYSTALLINE MATERIALS
International Journal for Multiscale Computational Engineering, Vol.13, 2015, issue 2
Adam Mrozek, Tadeusz Burczynski
Interfacial Microstructures in Martensitic Transitions: From Optical Observations to Mathematical Modeling
International Journal for Multiscale Computational Engineering, Vol.7, 2009, issue 5
Michal Landa, Ondrej Glatz, Hanus Seiner