The effect of grain size diversity on the flow stress of nanocrystalline metals by finite-element modelling

被引：15

作者：

Dobosz, Romuald ^{[1
]}

Lewandowska, Malgorzata ^{[1
]}

Kurzydlowski, Krzysztof J. ^{[1
]}

机构：

[1] Warsaw Univ Technol, Dept Mat Sci & Engn, PL-02507 Warsaw, Poland

来源：

SCRIPTA MATERIALIA | 2012年 / 67卷 / 04期

关键词：

Nanocrystalline materials; Mechanical properties; Finite-element analysis; Grain size diversity; SEVERE PLASTIC-DEFORMATION; NANOSTRUCTURED MATERIALS; MECHANICAL-BEHAVIOR; COPPER; DEPENDENCE; STRENGTH; EXTRUSION; DUCTILITY; CU;

D O I：

10.1016/j.scriptamat.2012.05.043

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The results of finite-element modelling of the effect of grain size uniformity on the flow stress of nanocrystalline metals are reported. The results gave a clear evidence of grain size effect and the reverse Hall-Petch relationship, which is a consequence of macroscopic strain being preferentially accumulated at grain boundaries. They also show the importance of grain size distribution on the flow stress of polycrystals. In fact, K values for the polycrystalline aggregate decrease with increasing grain size diversity. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：408 / 411

页数：4

共 31 条

[1]

ANSYS Academic Associate, REL 12 1 HELP SYST T

[2] PLASTIC DEFORMATION OF POLYCRYSTALLINE AGGREGATES [J].

ARMSTRONG, R ;

DOUTHWAITE, RM ;

CODD, I ;

PETCH, NJ .

PHILOSOPHICAL MAGAZINE, 1962, 7 (73) :45-&

[3] Tensile properties of in situ consolidated nanocrystalline Cu [J].

Cheng, S ;

Ma, E ;

Wang, YM ;

Kecskes, LJ ;

Youssef, KM ;

Koch, CC ;

Trociewitz, UP ;

Han, K .

ACTA MATERIALIA, 2005, 53 (05) :1521-1533

[4]

DOBOSZ R, 2010, THESIS WARSAW U TECH

[5]

Estrin Y, 2003, J METASTAB NANOCRYST, V17, P29, DOI 10.4028/www.scientific.net/JMNM.17.29

[6] Using finite element modeling to examine the flow processes in quasi-constrained high-pressure torsion [J].

Figueiredo, Roberto B. ;

Cetlin, Paulo R. ;

Langdon, Terence G. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2011, 528 (28) :8198-8204

[7] Computational description of nanocrystalline deformation based on crystal plasticity [J].

Fu, HH ;

Benson, DJ ;

Meyers, MA .

ACTA MATERIALIA, 2004, 52 (15) :4413-4425

[8] Mechanical behavior of nanocrys.talline copper [J].

Guduru, Ramesh K. ;

Murty, K. Linga ;

Youssef, Khaled M. ;

Scattergood, Ronald O. ;

Koch, Carl C. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 463 (1-2) :14-21

[9]

Hall E., 1951, P PHYS SOC B, V64, P747, DOI [10.1088/0370-1301/64/9/303, DOI 10.1088/0370-1301/64/9/303]

[10] Nanoparticle consolidation using equal channel angular extrusion at room temperature [J].

Karaman, I. ;

Haouaoui, M. ;

Maier, H. J. .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (05) :1561-1576

← 1 2 3 4 →