Доступ предоставлен для: Guest
Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal for Multiscale Computational Engineering
Импакт фактор: 1.016 5-летний Импакт фактор: 1.194 SJR: 0.554 SNIP: 0.82 CiteScore™: 2

ISSN Печать: 1543-1649
ISSN Онлайн: 1940-4352

Выпуски:
Том 18, 2020 Том 17, 2019 Том 16, 2018 Том 15, 2017 Том 14, 2016 Том 13, 2015 Том 12, 2014 Том 11, 2013 Том 10, 2012 Том 9, 2011 Том 8, 2010 Том 7, 2009 Том 6, 2008 Том 5, 2007 Том 4, 2006 Том 3, 2005 Том 2, 2004 Том 1, 2003

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

Краткое описание

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:

A MULTISCALE APPROACH FOR THERMO-MECHANICAL SIMULATIONS OF LOADING COURSES IN CAST IRON BRAKE DISCS
International Journal for Multiscale Computational Engineering, Vol.14, 2016, issue 1
Stefan Schmid, Daniel Schneider, Michael Selzer, Christoph Herrmann, Britta Nestler
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
VARIATIONAL INEQUALITIES FOR HETEROGENEOUS MICROSTRUCTURES BASED ON COUPLE-STRESS THEORY
International Journal for Multiscale Computational Engineering, Vol.16, 2018, issue 2
Sonjoy Das, Gary F. Dargush, Ali R. Hadjesfandiari, Sourish Chakravarty
AN ATOMISTIC–CONTINUUM MULTISCALE METHOD FOR MODELING THE THERMOMECHANICAL BEHAVIOR OF HETEROGENEOUS NANOSTRUCTURES
International Journal for Multiscale Computational Engineering, Vol.16, 2018, issue 5
M. Jahanshahi, N. Jafarian, N. Heidarzadeh, Amir R. Khoei
Multiscale Total Lagrangian Formulation for Modeling Dislocation-Induced Plastic Deformation in Polycrystalline Materials
International Journal for Multiscale Computational Engineering, Vol.4, 2006, issue 1
Jiun-Shyan Chen, Nasr M. Ghoniem, Xinwei Zhang, Shafigh Mehraeen