Effects of grain size and temperature on mechanical response of nanocrystalline copper

被引：38

作者：

Fang, Te-Hua ^{[1
]}

Huang, Chao-Chun ^{[1
]}

Chiang, Tsung-Cheng ^{[1
]}

机构：

[1] Natl Kaohsiung Univ Appl Sci, Dept Mech Engn, Kaohsiung 807, Taiwan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 671卷

关键词：

Nanocrystalline; Yield stress; Grain growth; Strain hardening; MOLECULAR-DYNAMICS; DEFORMATION; METALS; BOUNDARIES; CROSSOVER; GROWTH; MODEL;

D O I：

10.1016/j.msea.2016.06.042

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Molecular dynamics simulation is utilized to study the effects of grain size and temperature on the mechanical properties of quasi-two-dimensional (2D) nanocrystalline Cu with grain sizes of 3-8 nm under uniaxial tensile tests. Our results show that the grain growth is caused by the grain rotation and leads to strain hardening at 300 K for a grain size of < 5 nm and at 100 K for a grain size of <4 nm. For a grain size of <= 7 nm, the inverse Hall-Petch relation was observed in the yield stress. The Young's modulus for the quasi-2D system is higher than that for the three-dimensional (3D) system. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1 / 6

页数：6

共 38 条

[1] Applications of local crystal structure measures in experiment and simulation [J].

Ackland, GJ ;

Jones, AP .

PHYSICAL REVIEW B, 2006, 73 (05)

[2] Thickness and grain size dependent mechanical properties of Cu films studied by nanoindentation tests [J].

Cao, Z. H. ;

Li, P. Y. ;

Lu, H. M. ;

Huang, Y. L. ;

Meng, X. K. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2009, 42 (06)

[3] Evidence for crystallographically abrupt grain boundaries in nanocrystalline copper [J].

Champion, Y ;

Hÿtch, MJ .

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS, 1998, 4 (02) :161-164

[4] ON THE VALIDITY OF THE HALL-PETCH RELATIONSHIP IN NANOCRYSTALLINE MATERIALS [J].

CHOKSHI, AH ;

ROSEN, A ;

KARCH, J ;

GLEITER, H .

SCRIPTA METALLURGICA, 1989, 23 (10) :1679-1683

[5] TIGHT-BINDING POTENTIALS FOR TRANSITION-METALS AND ALLOYS [J].

CLERI, F ;

ROSATO, V .

PHYSICAL REVIEW B, 1993, 48 (01) :22-33

[6] Dislocation emission around nanoindentations on a (001) fcc metal surface studied by scanning tunneling microscopy and atomistic simulations -: art. no. 036101 [J].

de la Fuente, OR ;

Zimmerman, JA ;

González, MA ;

de la Figuera, J ;

Hamilton, JC ;

Pai, WW ;

Rojo, JM .

PHYSICAL REVIEW LETTERS, 2002, 88 (03)

[7] Grain boundaries of nanocrystalline materials - their widths, compositions, and internal structures [J].

Fultz, B ;

Frase, HN .

HYPERFINE INTERACTIONS, 2000, 130 (1-4) :81-108

[8] Studying the elastic properties of nanocrystalline copper using a model of randomly packed uniform grains [J].

Gao, Guo-Jie J. ;

Wang, Yun-Jiang ;

Ogata, Shigenobu .

COMPUTATIONAL MATERIALS SCIENCE, 2013, 79 :56-62

[9] Stress-assisted discontinuous grain growth and its effect on the deformation behavior of nanocrystalline aluminum thin films [J].

Gianola, D. S. ;

Van Petegem, S. ;

Legros, M. ;

Brandstetter, S. ;

Van Swygenhoven, H. ;

Hemker, K. J. .

ACTA MATERIALIA, 2006, 54 (08) :2253-2263

[10] Crossover from grain boundary sliding to rotational deformation in nanocrystalline materials [J].

Gutkin, MY ;

Ovid'ko, IA ;

Skiba, NV .

ACTA MATERIALIA, 2003, 51 (14) :4059-4071

← 1 2 3 4 →